1?????????????17????,?????????(???“?”)??????????????,???????????????,?2000???
?,?????????,????????“?????????”,????,??,????????????,?????????
????,?2000????,???10000psi(????),???????????????????????????????????690??????????????????,??????46?,??30??????????????,???????????????????????????????????????????(????????????????????? ???:??????)
???????????:?????????
????????????:????????????
??2???????0.8%??????
????????????:?????????
??????H-1B??????????????
??????????????????????
?????????12????????
??????????!??????????40?
ISM??????????????
????????????????????
?????????????????????
??|????????:????????
??2?????????:?????????
??????GM??:???????????
?????????????????????
????????????????????
??????GM??:???????????
??:??????????
??:???????????????????
??????????????2000?????
???:????????????????
????????23????2???????
??????:?????????????
??????H-1B??????????????
????????????????????
??????????!??????????40?