Spare parts are parts of machines which can be used as alternatives of the working parts when the working parts are not in service.
举一反三
- Which materials can be used for its different parts?
- What of the following are indicated in assembly drawings？（ ） A: Surface roughnesses of parts B: Assembling relationships of parts C: Geometrical tolerances of parts D: Working principle of assembly
- Which of the following italicized parts is used as an object?_____ (2011)
- Life Studies altogether consists of_____. A: two parts B: three parts C: four parts D: five parts
- Standard parts can be measured（）