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?????????47mm??Q420q??????????????

?????????2017/6/21

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?????????47mm??Q420q??????????????

Q420q??????????????????<BR>???????????????????????????????壬????????????????????????????????????β????q????????<BR>????????????????????í??????????A3q?????????????????16q????????????????12Mnq??12MnVq??15MnVNq??16Mnq??????????????4.5~50?????<BR>???????<BR>????????í???????????·?????·?????????纣??????

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Q420q??????????????????
8* 2200*8000+ 32??
10* 2200*8000+ 98??
139*1684*4688+ 32??
12*2200*8000+ 98??
16*2200*8000+ 78??