井下管柱结构中WRScssV怎么译？

更新时间2019-03-03 01:27:20

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

需要提供论文全文才能了解其含义。