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2021-10-31

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????????????????????????塢????????????????? ??ó???????5?/С?;????12?/С? ......

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1.??????????5?/С?(???????????????ο?)

2.?и????????????????????????????ο?,????????????????в????

?и????壨?????????1mm???????????

?С??????0.7?????????????(???15.5Mpa,????99.5%)???20??????С????????????????14?/С???

?и???????????壨?????????1mm???????????????????

???????????и????????????????????????????99.99%?????????99.99%??????ü??????????????99.99%??????????????????????????????????????????????????????,????й?125????320?/??????????12С???320/12=26.7?/С???