?????·?????????????????
??·????????????????????????
28*2200*6000
30*2200*6000
32*2200*6000
34*2200*6000
36*2200*6000
??·????????????????????????
????????HR??
??HB>450??????????С?????????ò????????????????????????????????????????120???????????????1.59??3.18mm?????????????????????????棬??????????????????????????????????????
???40*1.8*7??q420q??·??????????????????????
