847844951 发表于 2012-5-23 21:15 0 z& n- P5 A0 q4 X3 _7 Z6 M6 O如果你要促进内需的话就用A3好了
xvhuihui 发表于 2012-5-23 15:16 7 K9 Y7 E- U; d( a 铸铁,40Cr,45,20CrMnMo,20CrMnTi,20CrMo
sjkabc 发表于 2012-5-24 18:12 . C, m) c$ s% r2 h5 q' A难怪齿轮用了没多久就不行了。原来这玩意也能做齿轮。坑爹啊……
xvhuihui 发表于 2012-5-23 15:16 8 ^7 |- B7 q: S 铸铁,40Cr,45,20CrMnMo,20CrMnTi,20CrMo
chenjie1912 发表于 2012-5-23 21:30 3 i& g' N3 H) {4 k: a% l/ J! G40Cr