【摘要】 介绍了按"基准重合"原则编制机械加工工艺过程时,当设计基准在零件体外,可以用工艺孔(销)来体现设计基准。更多还原

【Abstract】 When design standard is out of the part, it may quarantee the interchange of parts and improve the quanlity of product to appear as technics and process with the principle of standard superposition更多还原