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發(fā)布時(shí)間: 2020-11-7 19:39
正文摘要:如圖一,按照實(shí)際使用M8的膨脹螺栓,鉆孔尺寸應(yīng)該在12.5左右,但是為什么按照第二張圖,標(biāo)準(zhǔn)JB-ZQ 4763-2006 ,M8的膨脹螺栓給的鉆孔尺寸是8,這不是很明顯小了? |
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