《英语 第2版 上》PDF下载

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  • 作  者:北京农业机械化学院
  • 出 版 社:北京:农业出版社
  • 出版年份:1979
  • ISBN:9144·51
  • 页数:246 页
图书介绍:

CONTENTS 1

Set 1 1

A.MECHANISM ILLUSTRATION 1

B.DRAWING 7

C.IDEAL AND PRACTICAL MACHINES 11

Set 2 16

A.FRICTION FORCES AND ROLLING FRICTION 16

B.FRICTION AND LUBRICATION 23

C.PREFACE TO“GRAPHICS INENGINEERING DESIGN” 27

A.BEARINGS 31

Set 3 31

B.ROLLING CONTACT BEARINGS 37

C.FRICTION 42

Set 4 45

A.POWER-TAKE-OFF DRIVES 45

B.SHAFTS AND COUPLINGS 52

C.BEARINGS 57

Set 5 60

B.TYPES OF GEARS 67

A.GEARING 69

C.LOADS IMPOSED ON PTO SHAFTS 72

A.BELT DRIVES 75

Set 6 75

B.V BELTS 81

C.TYPES OF DRIVE CHAIN COMMON ON FARM MACHINES 86

Set 7 89

A.HYDRAULIC SYSTEMS FOR FARM EQUIPMENT 89

B.PUMPS 96

C.VARIABLE-SPEED V-BELT DRIVES 101

Set 8 105

A.SINGLE PHASE ELECTRIC MOTORS 105

B.SELECTING ELECTRIC MOTORS 112

C.HYDRAULIC PUMPS 118

A.POSSIBLE APPLICATIONS FOR SMALL COMPUTERS WITHINFARMING 123

Set 9 123

B.THE ULTIMATE MACHINE:THE ELECTRONIC COMPUTER 130

C.MOTOR PROTECTION AND CONTROL 135

Set 10 140

A.AGRICULTURAL ENGINEERING AND ITS OBJECTIVES 140

B.PREFACE TO“INTRODUCTION TO AGRICULTURALENGINEERING” 146

C.PREFACE TO“DIGITAL COMPUTER FUNDAMENTALS” 152

APPENDIX Ⅰ:VOCABULARY 156

APPENDIX Ⅱ:BIBLIOGRAPHY 182

APPENDIX Ⅲ:CHINESE TRANSLATION OF TEXTS 183