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GB/T 70.1-2000的内六角螺钉M12承受的剪切力一般是多大或者抗剪切强度是多少? |
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小黑屋|手机版|Archiver|机械社区 ( 京ICP备10217105号-1,京ICP证050210号,浙公网安备33038202004372号 )
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