发布时间:2025-02-09 00:15:46
先总图,然后部件图纸,最后零件图纸。图纸都有编号,总图有各部件图纸编号,部件图纸又有零件图纸编号。一步步来,条理会很清晰。
公园里用800块面积为9平方分米的水泥方砖铺一条走廊走廊的宽是2米长应是多少米
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