发布时间:2025-02-06 22:07:40
镀层附着力测试:将3M胶纸贴在用百格刀划过的产品表面,贴紧后以45度方向迅速拉起镀层无脱落、气泡现象。
张小明打算用铁丝围一个面积是96平方厘米的长方形长和宽都是整厘米数他可以怎样围
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