????2????12? (???????????????? ?)????????????2???????11??17??30??,??????(??????:????)???????????????,????????(???????????:?)?????????????YF-75DA???????????,?“??????????????????????”?
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46???????????????????
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????:2016???147??10?10?
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?????4?1?????????9????
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??WTI????50???????
?????????????????????20%
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??:???????????21????
????????:??????????
4S??????????????:????????
??????400?????????????
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