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詢ASTM A570-50,,Grade 345 Type-1,Fy(min)=345MPA Or Fy(min)=34.5KN/cm2 產(chǎn)品生... |
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小黑屋|手機版|Archiver|機械社區(qū) ( 京ICP備10217105號-1,京ICP證050210號,,浙公網(wǎng)安備33038202004372號 )
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