??????????
?1???????????????????,????????AC?PU?
?????????????,??300MM???????/???????????????
??800MM-1200MM?????????????
????1500MM-2000MM?????????????????
????3000MM????????????????/???????????
???????????PE???????????????????????????????????????????1500MM???
??????????????????????????????
?2?????
??????????
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????????http://www.hyl1688.com/??????????????????2005???????????????????????????????????