3507| 7
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關(guān)于焊接標(biāo)注的問(wèn)題 |
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點(diǎn)評(píng)
一張圖紙就一種,,現(xiàn)在搞懂了
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點(diǎn)評(píng)
有焊接符號(hào) 但是開(kāi)始搞不清131代表什么焊接方法,,141代表......
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