847844951 發表于 2012-5-23 21:15 A' y4 @ [+ L' \( h如果你要促進內需的話就用A3好了
xvhuihui 發表于 2012-5-23 15:16 & v5 d& V5 n8 V3 e O5 c/ o& G6 r 鑄鐵,40Cr,45,20CrMnMo,20CrMnTi,20CrMo
sjkabc 發表于 2012-5-24 18:12 1 K6 Q, x: l2 j3 a難怪齒輪用了沒多久就不行了。原來這玩意也能做齒輪。坑爹啊……
xvhuihui 發表于 2012-5-23 15:16 . I9 |7 L% `, X9 u# j8 k, y7 `3 X鑄鐵,40Cr,45,20CrMnMo,20CrMnTi,20CrMo
chenjie1912 發表于 2012-5-23 21:30 ' c7 Y7 m4 Y% r% z. n 40Cr