91视频H污污

2024-06-04

??????? ???

91视频H污污

?????? ??? (CS) ??? ????? ???????? ???????????? ???? ??????? ?????. ?????????????, ????????? ????? ?????????? ?????????? ??????? ????????????????. ??????? ??????? ????? ??? ?????? ????? ???????????????? ????? ??? ?????? ???? ??? ?????????? ?????????? ??????? ????????. ????????? ??????? ???????.
?????????: ????????, ??? ??????????? ????? ????, ??. ????????? ??????? ???????????? ??????? ????????????. ????, CS ?????, ????? ??? ?????????? ?????????????.

????????? ????:
???????????, ??? ????? ?????? ??????? ????? ??? ?????? ???? ????? 100% ????????, 100% ?????? ????? ?????????????? ??? ??????, ???? ??? ???? ??????? ????????????????.

??? ???????? ?????? ??????? (ASTM D395) ?????? ????????????? ????????? ?????, ???????? ???
????? ???? A:

????????? ??????? ??????? ???????? ???????? 1.8 kN ????? ??? ??????????? ????? ??????? ?????????????.

????? ???? B:
???????? ???? ??? ??????????????? 25% ???????? ??? ??? ??????????? ????? ??????? ?????????????.

???????? ??????? A ??????? B ?????? 30 ?????????? ?????? ????????? ????????? ?????, ??? ?????????? ???????? ?????????? ???????????????? ..
O-ring ???????? ??????? ????? ??? ASTM D14 B ?????? ??????????? ???????????????.

?????????? ???????? ???????

??? ??????????? ???????????? ?????????? ??????????? ????? ???????.

????? ???? A:
CA, ?????? ??????? A, CA = [(to - ti) / to]

????? ???? B:
CB, ?????? ??????? B, CB = [(to - ti) / (to - tn)) * 100 ????? ????? ?????????. tn ?????? ????????????? ??????? ????

???????:
???????? = (t0 - ti) = 0.25 cm - 0.177 cm = 0.073 cm (29% ????????)

??????? ???????? = (t0 - tn) = 0.221 cm - 0.177 cm = 0.044 cm

CB = {(0. 25 - 0.221) / 0. 25 - 0.177)}/100 = 39. 72%

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