关键字:css 更新时间:2019-03-03 01:27:20 158次访问
In addition TRSSV should have an upper nipple profile sub and contingent lock open feature and insert WRScssV if flapper actuation mechanism fails. Continuous 1/4” Alloy (seamless) control line should be used.
TRSSV:油管可回收式井下安全阀
WRScssV:钢丝回收井下安全阀
WR:钢丝回收
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