2998| 6
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SW焊件有兩種材質(zhì), |
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點(diǎn)評(píng)
嚴(yán)格說(shuō)不是焊接圖,是一個(gè)多實(shí)體圖,就是一個(gè)鋸片,它鋸齒是硬質(zhì)合金
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