rambomenaa كبير مهندسين
عدد المساهمات : 2041 التقييم : 3379 تاريخ التسجيل : 21/01/2012 العمر : 47 الدولة : مصر العمل : مدير الصيانة بشركة تصنيع ورق الجامعة : حلوان
| موضوع: كتاب التصميم الميكانيكي - Mechanical Design الجمعة 15 يونيو 2012, 10:29 pm | |
|
أخوانى فى الله أحضرت لكم كتاب التصميم الميكانيكي Mechanical Design Antonino Risitano
ويتناول الموضوعات الأتية :
Contents Preface vii Symbols ix Section I? Setting?Project?Methodology Chapter 1 Approaches.to.Designing.and.Developing.the.Product 3 1.1. Introduction 3 1.2. Approaches.to.Designing.and.Developing.the.Product 3 1.3. The.Main.Activity.in.Designing.a.Product 5 1.4. Methodological.Evolution.in.Designing.the.Product .7 1.5. Concurrent.Engineering .7 1.6. Life.Cycle.Design .9 1.7. Design.for.X . 10 1.7.1. Property-Objective.of.Design.for.X 11 1.8. Correlating.and.Choosing.Design.Tools . 11 1.9. Other.Tools.and.Design.Approaches 12 1.9.1. Knowledge-Based.Engineering . 12 1.9.2. Total.Quality.Management 12 1.9.3. Reverse.Engineering . 12 Chapter 2 Mechanical.Design.and.Environmental.Requirements . 15 2.1. Introduction 15 2.2. Design.and.Environmental.Requirements 15 2.3. Design.for.Environment . 16 2.4. Optimum.Environmental.Performance 17 2.5. . Implementing.Design.for.Environment.and.General.Guidelines . 17 2.6. Product.Life.Cycle.and.Environmental.Impact 18 2.7. Environmental.Impact.of.the.Product 19 2.8. Modeling.the.Life.Cycle .20 2.9. Life.Cycle.Assessment 23 2.9.1. Methodological.Premises,.Property,.and.Structure 23 2.9.2. Eco-Indicators.to.Quantify.Environmental.Impact 25 2.10. Introducing.Environmental.Factors.in.the.Design.Process 26 2.11. Integrating.Life.Cycle.and.Design .27 2.11.1. The.Role.of.Life.Cycle.Design 29 2.12. . Integrating.Environmental.Aspects.with.Product.Development 29 2.13. Environmental.Strategies.for.Product.Planning .30 2.13.1. Useful.Life.Extension.Strategies . 32 2.13.2. Reclamation.Strategies.at.End.of.Useful.Life . 32 2.14. Methodological.Setup.and.Design.Tools 35 2.15. . The.Role.of.Design.for.X.in.Designing.for.Environmental.Requisites 36 2.15.1. Design.for.X.for.Environmental.Strategies .39vi Contents 2.15.2. Design.for.X.Setup.in.Product.Development 39 2.16. Tools.for.Integrated.Design:.Overview 40 Section II? The?Properties?of?Design?Materials Chapter 3 Materials.for.Mechanical.Design 45 3.1. Introduction 45 3.2. Metallic.Materials.and.Alloys 45 3.3. Solid.State.and.Structure.of.Metals 46 3.3.1. Solidifcation . 47 3.3.2. Lattice.Defects 47 3.4. Iron–Carbon.Alloys 48 3.4.1. Cast.Irons 48 3.4.1.1. In?uence.of.Common.and.Special.Elements.on.Cast.Irons.49 3.4.1.2. Gray.Cast.Iron.Classifcation .50 3.4.1.3. Special.Cast.Irons.Classifcation . 51 3.4.1.4. Spheroidal.Cast.Irons.Classifcation 51 3.4.1.5. Cast.Iron.Alloys.Classifcation 51 3.4.1.6. Malleable.Cast.Irons.Classifcation . 51 3.4.2. Steels . 52 3.4.2.1. Manganese.Steels 53 3.4.2.2. Chromium.Steels . 53 3.4.2.3. Nickel.Steels 54 3.4.2.4. Tungsten.Steels 54 3.4.2.5. Molybdenum.Steels .54 3.4.2.6. Silicon.Steels .54 3.4.2.7. Less.Common.Carbon.Steel.Alloys 55 3.4.2.8. Special.Stainless.Corrosion.and.Heat-Resistant.Steels . 55 3.5. Non-Ferrous.Metals.and.Their.Alloys .56 3.5.1. Copper .56 3.5.2. Copper–Tin.Binary.Alloys.(Cu-Sn.Bronzes) 56 3.5.3. Copper–Tin–Zinc.Alloys .56 3.5.4. Copper–Tin–Zinc–Nickel.Alloys 56 3.5.5. Low.Lead.Copper.Alloys 57 3.5.6. Copper–Lead–Tin.Alloys 57 3.5.7. High.Lead.Bronzes.(Cu–Sn–Zn–Pb) 57 3.5.8. Aluminum.Bronzes . 58 3.5.9. Industrial.Bronze .59 3.5.10. High.Resistance.Brass . 59 3.5.11. Foundry.Brass . 59 3.5.12. Pressure.Die-Casting.Zinc.Alloys .60 3.5.13. High.Aluminum.Zinc.Alloys 60 3.5.14. Lead.Alloys .60 3.5.15. Alloys.for.Cables .60 3.5.15.1. Aluminum 61 3.5.15.2. Magnesium 61 3.5.15.3. Titanium . 61 3.5.15.4. Nickel . 62Contents vii 3.5.15.5. Chromium 62 3.5.15.6. Vanadium . 62 3.5.15.7. Cobalt . 62 3.5.15.8. Tungsten.(Wolfram) . 62 3.5.15.9. Molybdenum 63 3.6. An.Outline.of.Polymeric.Materials 63 3.6.1. Polymer.Classifcation .63 3.6.1.1. Origin-Based.Classifcation .63 3.6.1.2. Classifcation.Related.to.Temperature.Effects .64 3.6.1.3. Classifcation.According.to.Physical.Characteristics 64 3.6.2. Synthetic.Resins 64 3.6.2.1. Macromolecule.Structure 64 3.6.2.2. Production 64 3.6.3. Main.Properties.of.Polymeric.Materials .65 3.6.3.1. Mechanical.Properties .65 3.6.3.2. Thermal.Properties 65 3.6.4. Commonly.Used.Polymers 65 3.6.4.1. Cellulose.Resins .65 3.6.4.2. Styrene.Resins .66 3.6.4.3. Acrylic.Resins 66 3.6.4.4. Polyamide.Resins . 67 3.6.4.5. Fluorinated.Resins . 67 3.6.4.6. Phenolic.Resins 68 3.6.4.7. Amino.Resins 68 3.6.4.8. Allyl.Resins .68 3.6.4.9. Polyester.Resins .68 3.6.4.10. Epoxy.Resins .68 3.6.4.11. Polyurethanes .69 3.6.4.12. Silicones .69 3.7. Outline.of.Composites 69 3.7.1. Matrices .70 3.7.2. Polyester.Matrices . 71 3.7.3. Epoxy.Matrices . 71 3.7.4. Phenolic.Matrices 71 3.7.5. Silicone.Matrices . 71 3.7.6. Fibrous.Stiffening 71 3.7.7. Glass.Fibers . 71 3.7.8. Carbon.Fibers 72 3.7.9. Boron.Fibers 73 3.7.10. Aramid.Organic.Fibers .73 3.7.11. Admissible.Load.and.Elasticity.Modulus .73 3.7.12. Multilayer.Laminates 73 3.8. Outline.of.Ceramic.Materials . 74 Chapter 4 Characterization.of.Metals 77 4.1. Introduction 77 4.2. Tensile.Stress.Tests . 78 4.3. Static.Elastoplastic.Characterization 79 4.4. Plastic.Constituent.Link .83 4.5. Notes.about.Mechanical.Characterization.Tests 86viii Contents 4.5.1. Compression.Tests .86 4.5.2. Curvature.Tests .86 4.5.3. Shearing.Tests .88 4.5.4. Torsion.Tests 88 4.5.5. Hardness.Tests .88 4.5.6. Brinell.Hardness/Number .88 4.5.7. Diamond.Pyramid.Hardness.Number.(Vickers) .90 4.5.8. Rockwell.Hardness 91 4.5.9. Knoop.Hardness 92 4.5.10. Resilience.Tests .92 4.5.11. Standard.Bars 93 4.5.12. Other.Test.Bars 93 4.6. Notes.about.Technological.Characterization.Tests 94 4.6.1. Drawing.Tests 95 4.6.2. Erichsen.Drawing.Test 95 4.6.3. Erichsen.Drawing.Test.Modifed.(UNI.4693) .96 4.6.4. Socket.Drawing.Test.(UNI.6124) 96 4.6.5. Pomp.Drawing.Test .96 4.6.6. Bending.Test 97 4.6.7. Template.Bending 97 4.6.8. Mandrel.Bearing.Bending .98 4.6.9. Percentage.Elongation.and.the.Tetmajer.Coeffcient 98 4.6.10. Forging.Tests .100 4.6.11. Stretch.Tests 100 4.6.12. Heading.Test 100 4.7. Metallurgic.Tests 101 4.8. Tube.Tests . 102 4.8.1. Enlargement.Tests . 102 4.8.2. Beading.Test.(Flanging.Test) 103 4.8.3. Compression.Test 104 4.8.4. Tensile.Stress.Test . 104 4.9. Tests.on.Steel.Wires . 104 4.10. Final.Indications . 105 Chapter 5 Stress.Conditions . 107 5.1. Introduction 107 5.2. Mechanical.Behavior.of.Materials . 107 5.3. Conditions.of.Mechanical.Stress 108 5.3.1. Simple.Tensile.Stress . 108 5.3.2. Simple.Compression 112 5.3.3. Simple.Bending.of.Beams . 114 5.3.4. Simple.Torsion . 116 5.3.5. Simple.Shearing 118 5.3.6. Buckling.of.Column.Bars 121 Chapter 6 Fatigue.of.Materials 127 6.1. General.Concepts . 127 6.2. Load.Characteristics . 129 6.3. Fatigue.Diagrams . 131Contents ix 6.4. Thermography.to.Defne.Fatigue.Behavior 133 6.5. Determining.the.Fatigue.Curve 136 6.6. . Fatigue.Limit.by.Thermal.Surface.Analysis.of.Specimen.in.Mono.Axial. Traction.Test .138 6.7. Residual.Resistance.of.a.Mechanical.Component 140 6.8. The.Factors.In?uencing.Fatigue . 143 6.9. Safety.Factor . 145 6.10. Stress.Concentration.Factor 147 6.11. Fatigue.Resistance.of.Welded.Machine.Components 153 6.12. Internal.Material.Damping . 155 6.13. Test.Machines . 157 6.14. Conclusions.about.Designing.a.Mechanical.Component . 158 Chapter 7 Optimal.Materials.Selection.in.Mechanical.Design . 161 7.1. Introduction 161 7.2. Design.Requirements.and.Correlation.with.Materials . 161 7.3. Primary.Constraint.Selection . 164 7.4. Approaches.to.the.Best.Choice.of.Materials 164 7.5. Tools.for.Selection.of.Properties 165 7.5.1. Standard.and.Weighted.Properties.Method 165 7.5.2. Method.of.Limits.and.Objectives.on.Properties . 168 7.6. Integrated.Selection.Tools 170 7.6.1. Analytical.Formulation . 170 7.6.2. Graphic.Selection 173 7.6.3. Application 175 7.6.4. Research.Development 176 Section III? Design?of?Mechanical?Components?and?Systems Chapter 8 Failure.Theories 181 8.1. Material.Strength.and.Design . 181 8.2. Stresses.in.a.Three-Dimensional.Object 181 8.3. Main.Stresses 184 8.4. Mohr’s.Circles 185 8.4.1. Simple.Tensile.Compression.Stress.Compression.(Figure.8.6) . 186 8.4.2. Bending.and.Shearing.(Figure.8.7) . 186 8.4.3. Pure.Torsion.(Figure.8.8) 186 8.5. Failure.Hypothesis 186 8.5.1. Maximum.Linear.Strain.Hypothesis . 188 8.5.2. Maximum.Tangential.Stress.Hypothesis 188 8.5.3. Deformation.Energy.(Beltrami’s).Hypothesis . 191 8.5.4. Distortion.Energy.(Von.Mises’s).Hypothesis 192 8.6. Failure.Hypotheses:.A.Comparison . 195 Chapter 9 Hertz.Theory . 197 9.1. Introduction 197 9.1.1. Sphere.versus.Sphere.Contact .208x Contents 9.1.2. Cylinder.versus.Cylinder.Contact .208 9.2. Application.to.Rolling.Contact.Bearings .209 9.3. Approach 210 9.4. Equivalent.Ideal.Stress.in.Hertzian.Contact . 212 9.5. Loads.on.the.Ball.Bearings 213 Chapter 10 Lubrication 217 10.1. Introduction 217 10.2. Prismatic.Pair.of.Infnite.and.Finite.Length 220 10.3. Calculation.of.Michell.Thrust.Bearings .223 10.4. . Journal-Bearing.Pair:.Setting.Reynolds’.Equation.and.Clearance.Height 226 10.5. Infnite.Length.Journal-Bearing.Pair .227 10.6. Journal-Bearing.Pair.of.Finite.Length:.Schiebel’s.Formulae . 232 10.7. . Journal-Bearing.with.Finite.Length:.Bosch’s.Approximate.Computation .236 10.8. Journal-Narrow.Bearing.Pair:.Ocvirk’s.Hypothesis 237 10.9. . Lubricated.Journal.with.Finite/Infnite.Length:.Raimondi–Boyd. Calculation 238 10.10. Notes.on.Lubricants 246 Chapter 11 Shafts.and.Bearings 249 11.1. Shafts 249 11.2. Shaft.Measuring .249 11.2.1. Two-Bearing.Shafts.(Isostatic) 250 11.2.2. Shafts.with.More.than.Two.Bearings.(Hyperstatic) 252 11.3. . Deformation.Limits.and.Determination.of.Elastic.De?ections . 253 11.3.1. Assessment.of.Shaft.Elasticity 253 11.4. Rolling-Contact.Bearings.(Anti-Friction.Bearings) . 257 11.4.1. Classifcation.of.Bearings . 257 11.4.2. Classifcation.by.Rolling.Body.Shape . 257 11.4.3. Classifcation.by.Assembly.Method 257 11.4.4. Classifcation.by.Thrust.Direction 257 11.5. General.Assembly.Rules 259 11.6. Bearing.Adjustment 259 11.7. Assembly.Models .260 11.8. Friction.Bearings 266 Chapter 12 Splined.Couplings,.Splines.and.Keys 271 12.1. Splined.Couplings 271 12.2. Splines.and.Tongues . 273 12.3. Transverse.Splines 280 12.4. Spur.Gears 284 Chapter 13 Springs .287 13.1. Introduction 287 13.2. Spring.Computation 288 13.3. Bending.Springs . 291 13.3.1. Leaf.Springs 296Contents xi 13.3.2. Leaf.Springs.with.Spring.Shackles .297 13.3.3. Characteristics.of.Leaf.Spring.Systems 303 13.3.4. Coil.Springs .304 13.3.5. Cylindrical.Helical.Springs .309 13.3.6. Conical.Disc.Springs . 311 13.3.7. Variable.Thickness.Disc.Springs 313 13.3.8. Diaphragm.Spring . 316 13.4. Torsion.Springs . 319 13.4.1. Torsion.Bars 321 13.4.2. Cylindrical.Helix.Torsion.Springs 322 13.4.3. Conical.Helix.Torsion.Springs 325 13.5. Compression.Springs 329 13.6. Resonant.Spring.Calculations 333 Chapter 14 Flexible.Machine.Elements . 339 14.1. Introduction 339 14.2. Belts 339 14.3. Sizing.Belts .340 14.4. Timing.Belts . 342 14.5. Precautions.for.Testing.Durability . 343 Section iV? Design?of?Components?and?Mechanical?Systems Chapter 15 Spur.Gears . 347 15.1. Introduction 347 15.2. Introductory.Ideas.and.Preliminary.Defnitions 347 15.3. Defnitions.and.Nomenclature 347 15.4. Gear.Sizing . 352 15.5. Cut.and.Operating.Conditions 353 15.5.1. Ordinary.Sizing . 354 15.6. Involute.Equation 354 15.7. Determining.Tooth.Thickness 355 15.8. Tooth.Base.Fillets . 359 15.9. Euler–Savary.Theorem . 361 15.10. Interference.and.Schiebel’s.Fillet . 362 15.11. Meshing 365 15.12. Expressing.Contact.Segment.and.Action.Arc 368 15.13. Condition.of.Non-Interference . 370 15.14. . Reduction.of.the.Contact.Line’s.Usable.Segment.Due.to.Interference 373 15.15. Specifc.Creep . 378 15.16. Modifcated.Gears 381 15.17. German.Norms.on.Modifcated.Gearing . 391 15.18. Loads.When.Engaging.Gears . 393 15.19. Verifcation.Calculations.for.Gear.Resistance .394 15.19.1.Calculating.Tooth.Bending .394 15.19.2.Teeth.Wear.Calculation .399 15.20. . Notes.on.the.“American”.Norms.for.Calculating.Toothing.(Agma) 402xii Contents 15.20.1.Bending.Test 402 15.20.2.Wear.Verifcation 403 15.20.3.Corrective.Coeffcients.for.Fatigue .403 15.21. Design.Phases.for.a.Gearing 405 Chapter 16 Press.and.Shrink.Fits .407 16.1. Introduction 407 16.2. Fixing.Flywheel.Components 407 16.3. Forced.Hub-Shaft.Shrinking 414 16.4. . The.Relationship.between.Interference.and.Thermal.Variation 421 Chapter 17 Pressure.Tubes . 423 17.1. Introduction 423 17.2. Sizing.and.Verifying.Pipe.Strength 423 17.3. Strength.Verifcation.for.Pressurized.Vessels 426 17.4. Some.Oil.Pipe.Considerations 427 17.4. Instability.in.Externally.Pressed.Pipes 428 17.5. Calculations.for.Flange.Bolts . 431 17.6. Fixed.Flange.Calculations 432 17.7. Free.Flange.Calculation . 434 17.8. Flange.Bolts 435 17.9. Notes.on.Hot.Metal.Creep 436 17.9.1. Creep.Tests 437 17.9.2. Microstructural.Aspects.of.the.Deformation.Phases 440 17.9.3. Physical.Interpretation.of.Creep 441 17.10. Brief.Notes.on.Testing.Creep .442 Chapter 18 Welded.Joints 443 18.1. Introduction 443 18.2. Welding.Defects .444 18.3. Weld.Tests .446 18.4. Weld.Strength .447 18.5. Static.Calculation .447 18.6. Static.Calculation.According.to.Norm.CNR-UNI.10011 .448 18.7. . Static.Calculation—Head.and.Complete.Penetration.Weld .448 18.8. Static.Calculation—Welds.with.Corner.Beads 449 18.9. Loads.on.the.Bead 451 18.10. Fatigue.Calculation . 453 18.11. Fatigue.Calculation.According.to.Norm.CNR-UNI.10011 454 18.11.1.Fatigue.Resistance—?N Curves.with.?? Stress.(Figure.18.17) . 454 18.11.2.Fatigue.Resistance—?N Curves.with ?? Stress.(Figure.18.18) 455 18.11.3 Fatigue.Resistance—In?uence.of.Thickness.on.Acceptable.? . 455 18.12. Spot.Welding 456 18.12.1.Static.Calculation 457 18.12.2.Fatigue.Calculation . 458 18.13. Riveted.Joint . 459Contents xiii Chapter 19 Couplings 467 19.1. Preliminary.Notions.and.Types.of.Joints .467 19.2. Rigid.Joints .468 19.2.1. Box.Coupling/Sleeve.Joint 468 19.2.2. Cylindrical.Joints 469 19.2.3. Disc.and.Flange.Couplings . 471 19.3. Fixed.Semi.Elastic.and.Elastic.Joints . 475 19.4. Peg.Joints 478 19.5. Spring.Joints .480 19.5.1. Bibby.Joint .480 19.5.2. Voith.Maurer.Joint .487 19.5.3. Forst.Joint 488 19.6. Mobile.Joints 490 19.6.1. Cardan.(Universal).Joint . 491 19.6.2. Oldham.Joint .496 Chapter 20 Clutches . 501 20.1. Introduction 501 20.2. Friction.Clutches . 501 20.3. Flat.Plate.Clutches 506 20.4. Cone.and.Double.Cone.Clutches 510 20.5. Radial.Block.Clutches 512 20.6. Surplus.Clutches . 517 20.6.1. Cylindrical.Rollers 517 20.6.2. Non-Cylindrical.Rollers,.Blocked . 518 20.7. Safety.Clutches . 520 20.8. Centrifugal.Clutches . 521 Chapter 21 Brakes 529 21.1. Introductory.Concepts 529 21.2. Disc.Brakes . 530 21.3. Performance.and.Dimension.Analyses 534 21.4. Drum.Brakes 545 21.4.1. Calculations.and.Sizing .548 21.5. Ribbon.Brakes 557 21.6. Differential.Ribbon.Brakes 560 Chapter 22 Case.Study:.Design.of.a.Differential . 563 22.1. Introduction 563 22.2. Review.for.the.Gears.Project 564 22.3. Dimensioning.of.the.Bevel.Gears .566 22.3.1. Introduction .566 22.3.2. Calculation.of.the.Teeth.Number 567 22.3.3. Bending.Calculations 568 22.3.4. Wear.Calculation .568 22.3.5. Dynamic.Verifcation 569 22.3.6. Bending.Verifcation.of.the.Crown .569 22.3.7. Dynamic.Rim.Verifcation 569xiv Contents 22.4. Project.of.Planetary.Reducer 570 22.4.1. Introduction . 570 22.4.2. Teeth.Number.Calculation 570 22.4.3. Bending.Calculation 571 22.4.4. Wear.Calculation . 572 22.4.5. Dynamic.Verifcation 572 22.5. Differential.Gear.Dimensions 573 22.5.1. Calculation.of.the.Number.of.Teeth 573 22.5.2. Bending.Calculation 574 22.5.3. Wear.Calculation . 575 22.5.4. Dynamic.Verifcation 575 22.6. Measurement.of.Time.Gearing 575 22.6.1. Introduction . 575 22.6.2. Bending.Calculation 582 22.6.3. Wear.Verifcation 582 22.6.4. Bending.and.Wear.Verifcation.of.the.External.Rim 583 22.7. . Dimensioning.of.the.Shaft.Pinion.and.Choice.of.the.Bearings .583 22.7.1. Calculating.Splined.Profle . 583 22.7.2. Calculation.of.Reaction.Forces . 585 22.7.3. Calculation.of.the.Shaft . 588 22.7.4. De?ection.Verifcation 590 22.7.5. Choice.of.Bearings 591 22.8. Choice.of.the.Differential.Bearings.Box 593 22.9. Dimensioning.of.the.Pins .596 22.9.1. Pins.of.the.Epicyclic.Speed.Reducer .596 22.9.2. Maximum.De?ection 597 22.9.3. Specifc.Pressure .597 22.9.4. Shear.and.Bending 597 22.9.5. Pins.of.the.Satellite.Differential 598 22.9.6. Dimensioning.at.De?ection .599 22.9.7. Specifc.Pressure.Verifcation .599 22.9.8. Verifcation.at.Shear.and.Bending .599 22.10. Dimensioning.of.the.Box.Screws .600 22.11. Dimensioning.of.the.Semi-Shaft 601 Appendix .606 Project.Data.Specifcation 606 Problems 617 References.
كلمة سر فك الضغط : books-world.net The Unzip Password : books-world.net أتمنى أن تستفيدوا منه وأن ينال إعجابكم رابط من موقع عالم الكتب لتنزيل كتاب التصميم الميكانيكي - Mechanical Design رابط مباشر لتنزيل كتاب التصميم الميكانيكي - Mechanical Design
|
|
Admin مدير المنتدى
عدد المساهمات : 18996 التقييم : 35494 تاريخ التسجيل : 01/07/2009 الدولة : مصر العمل : مدير منتدى هندسة الإنتاج والتصميم الميكانيكى
| موضوع: رد: كتاب التصميم الميكانيكي - Mechanical Design الجمعة 15 يونيو 2012, 10:49 pm | |
|
جزاك الله خيرا وبارك الله فيك وجعله فى ميزان حسناتك
|
|
rambomenaa كبير مهندسين
عدد المساهمات : 2041 التقييم : 3379 تاريخ التسجيل : 21/01/2012 العمر : 47 الدولة : مصر العمل : مدير الصيانة بشركة تصنيع ورق الجامعة : حلوان
| موضوع: رد: كتاب التصميم الميكانيكي - Mechanical Design السبت 16 يونيو 2012, 6:06 am | |
|
جزانا اللة واياك ونتمنى لكم الاستفادة . |
|
eng_lola مهندس تحت الاختبار
عدد المساهمات : 11 التقييم : 13 تاريخ التسجيل : 14/06/2012 العمر : 32 الدولة : مصر العمل : سيدة اعمال +رئيسة الوزراء...فيما بعد الجامعة : كلية الهندسة
| موضوع: رد: كتاب التصميم الميكانيكي - Mechanical Design الإثنين 29 أكتوبر 2012, 12:57 am | |
| |
|
mohamed_hamdy مهندس تحت الاختبار
عدد المساهمات : 13 التقييم : 15 تاريخ التسجيل : 05/10/2012 العمر : 35 الدولة : egypt العمل : eng الجامعة : menofia university
| موضوع: رد: كتاب التصميم الميكانيكي - Mechanical Design الإثنين 29 أكتوبر 2012, 1:24 am | |
|
الرابط لا يعمل برجاء تعديل الرابط |
|