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一根直棒,,怎么彎成這個(gè)形狀,?批量生產(chǎn) |
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點(diǎn)評
你標(biāo)題誤導(dǎo)別人了,,都以為是實(shí)心棒料呢。
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點(diǎn)評
剛才說錯(cuò)了。鋁的比重是2.9,。鐵7.85.不銹鋼7.93,。銅8.8。呵呵帶來不便請諒解�,。,。。,。,。�,!
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