Q420q??????????????????
????????????????????í??????????A3q?????????????????16q????????????????12Mnq??12MnVq??15MnVNq??16Mnq??????????????4.5~50????????????????????????·??·???????塣????н??????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????·????·????????46-160mm?????????
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?г????????????????г??????????????????????????????????????????????????????
????????????????????????????????????????????????????????????????????????????
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14??2000??8000+ 70??
8??2000??8000+ 21??
8??2000??8000+ 70??
8??2000??8000+ 32??
8??2000??8000+ 70??
10??2000??8000+ 21??
10??2000??8000+ 70??
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