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N

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ews center

PE?????????????????

???????2019-11-13

??1????????????????????????й?????裬?????????????????200mm?????????????????????????????????????

??2???纸????У???????????????

??3???????????????????????????????????????

2.???????

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7.??????μ??

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??2???°????????????????????涨??
PE?????????????????
1?????????????ε??50m??????????????????????в????????????????????????????洦???????m?????

2???????????????100m????????λ?????????е??????????????????λ????в??????????棬??????????????????????m?????

3?????????????????????????????????????????仯???????1?????????

??3???????????й????????????SV?????????????

SV = AdV /??d + 2e??x100??SV 5????1-6??

???У?AdV-????????????仯?? E-???????????????? D-???????????????????


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