What is the precision machining parts？

What is the precision machining parts？

What is the definition of mechanical parts? Which belongs to the mechanical parts? Corresponding to the casting, forging pieces is like?

Mechanical parts are defined:
1, parts - can not split a single component.
2 parts - to achieve an action (or: efficacy) of a combination of parts. Member may therefore a part, it can also be a combination of a plurality of parts. In this assembly, there is an important part of it to achieve the established action (or: efficacy), the other parts serve only as contiguous, fastening guide and other sponsorship role.

3 parts - all at the scene, all the parts and components in addition to the rack, collectively referred to as components. Of course, the frame is also member.

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