16Mnq??????????????????
8??2000??8000+ 42??
8??2000??8000+ 21??
10??1800??8000+ 32??
10??1800??8000+ 80??
10??2000??8000+ 21??
10??2000??8000+ 52??
10??2000??8000+ 42??
10??2000??8000+ 35??
12??1800??8000+ 42??
16Mnq???????????????????
????????????????????????????????????????????????????????????????????????????
??????????
???????????????г???????????????????????????????????????????????????????20??90??????
??????????150????????????????????????????????λ??????????????????????????г?????
??????????????????????????????
???????????????лл ?? ????? ?????16Mnq???????????
?????25mm???16Mnq???????????????