... meter number 仪表编号 meter of water column 水柱米 meter opening reading 开时油表读数 ...
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由于排汽凸轮盘不正确的定时或排汽系统背压过大（背压不能超过300毫米水柱）而导致燃气通过扫气口倒流。
C. Blow-back through the scavenge air ports, owing to an incorrectly adjusted exhaust cam disc or large resistance in the exhaust system(back pressure not exceed 300 mm wc)
分流术前门静脉平均压力为34.6匣米水柱， 分流术后平均降压6.7厘米水柱。
The mean portal pressure before shunt was 34.6 cmH_2O, and the average postshunt decrement was 6.7cmH_2O.
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