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??????????????2000????????

2025-01-18 20:09:50 90497

1????????17????,????(???“????”)???????????????,?,?????????2000???????

????????????????,???????????,??“??”,????,???????,????????????????,????????????????????????????????????

?????????????,??????????????2000??,?????????10000psi(?????????????????????),??????690?,????????46?,????30???,???????????(?????????????????? ??????????????:?)

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????????4.2???????15??


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