Dimensions mark is an important part of drawing spares mapping, and dimensions of spares mapping is the ruler of machining and checking spares.
尺寸标注是绘制零件工作图的一项重要内容，零件图中的尺寸是加工和检验零件的重要依据。
Dimensions mark is an important part of drawing spares mapping, and dimensions of spares mapping is the ruler of machining and checking spares.
尺寸标注是绘制零件工作图的一项重要内容，零件图中的尺寸是加工和检验零件的重要依据。
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