??θ???pe????????????????,???????????pe???4????????,?????θ???pe?????????ó???????????????????????????????????????HDPE??????????????,???????????????С???HDPE???????????,???HDPE????????????????????????,???????.???????,С??????????????????.
??θ???pe????????????????
1,????????:
??????,????????????(??????????210??10??C)???????,???????????????????????????????????. ??????????????????90mm??pe??.
2,????????????????:
HDPE???????ù????и??????????????????????????????.???????????????????????,???????????????????.???????????.
3,???????????:
????????????????????????.??????????????????????????????????????涨.
4,????????:?????????????????????,???????ú????????????(???,?????)???????????????????.????????????????????,?????,????????????.???????????????????,?????????,??????С?????,?????????????????????????????(????С,??????).
???????
???????????PE?????????渺?????????