请问下各位技术,这个符号是什么意思?那个4的意思明白,但是没见过这个符号。
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图纸在这。
技术要求4吧 是焊接的吗? 开坡口焊后磨平 应该是焊接符号,内外都是V焊缝。 是小日子的图纸的话,可能是修改标记 sgxap666 发表于 2025-1-22 12:07
是焊接的吗?
不是的,他有焊接的符号,美国人画的图。
GB/T12212-2012 焊脚4mm?
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