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ASTM A572對(duì)應(yīng)中國(guó)標(biāo)準(zhǔn)哪種型號(hào)板材? |
Re: ASTM A572對(duì)應(yīng)中國(guó)標(biāo)準(zhǔn)哪種型號(hào)板材?
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