相关文档

• 113_试卷试题(2).doc

  Text 1Materials differ widely in physical properties, machinability characteristics, methods of forming, and possible service lifeMechanical materials fall into two basic types: metallic or non-meta

• 112_试卷试题(2).doc

  Text 1Many metallic and nonmetallic materials can be machined without a cutting fluid, but in most cases, the application of a cutting fluid can improve the operation significantly Appropriate to va

• 117_试卷试题(2).doc

  Text 1Low-melting alloys are so named because of their relatively low melting points The major metals in this category are lead, zinc, and tin and their alloys Lead(Pb) has properties of high densit

• 111_试卷试题(2).doc

  Text 1Metals are found everywhere in our life They are classified into two categories, “ferrous” and “non-ferrous” metals Ferrous means relating to, or containing iron and non-ferrous means having n

• 131_试卷试题(2).doc

  Text 1abrasive machining processes to achieve the following results:1 Reduce friction and wear, thus improving tool life and surface finish2 Reduce forces and energy consumption3 Cool the cutting zo

• 103_试卷试题(2).doc

  Text 1The marketing department conducts market research and advertises, packages, sells, and distributes the product Market researchers do surveys to see what consumers want, if they like their prod

• 118_试卷试题(2).doc

  Text 1There are three basic methods of cutting fluid application:1 Flood cooling This is the mostmon method Flow rates range from 10 L/min (3 gal/min) for single-point tools to 225 L/min (60 gal

• 213_试卷试题(2).doc

  Text 1Materials differ widely in physical properties, machinability characteristics, methods of forming, and possible service lifeMechanical materials fall into two basic types: metallic or non-meta

• 123_试卷试题(2).doc

  Text 1A grinding machine is a random point cutting tool which uses abrasives in the shape of a wheel, bonded to a belt, a stick or simply suspended in liquidOn a cylindrical grinding machine the gri

• 133_试卷试题(2).doc

  Text 1Manufacturing gives jobs to people and makes the products consumers need Manufacturingpanies hire people with many types of skills and talents to help thepaniespete well in the wor