?? ????????2000??????????????
????:1???????100???:??????
2??????????
3????????
4????????
5???????????
1?????????????17????,???????????????(?????????)??????????????????,????,????2000???????
???,?????????,????????,????,????????,????????????,?????
?,??????2000?,???????????10000psi(????????????????),??690???,?????????46?,??????????????30???????,?????????????????????????????????????????????????????????(????????? ???:??)
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