11705| 28
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請(qǐng)問(wèn)用手電鉆在20厚的鋼板上打直徑6mm的通孔,,難度大嗎? |
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點(diǎn)評(píng)
是啊,,比起鉆孔,,工人更喜歡焊塊帶螺孔的板,甚至焊?jìng)(gè)螺母,。
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