精密机械加工是通过机器改变工件尺寸或性能的过程。精密机械加工的生产过程是指从原材料（或半成品）制造产品的全过程。它用于机械加工生产，包括原材料的运输和保存、生产准备、粗加工、零件加工和热处理、产品装配和调试、喷漆和包装。
Precision machining is the process of changing the size or performance of workpiece by machine. The production process of precision machining refers to the whole process of manufacturing products from raw materials (or semi-finished products). It is used for machining production, including transportation and preservation of raw materials, production preparation, rough processing, parts processing and heat treatment, product assembly and commissioning, painting and packaging.