![](https://static.youtibao.com/asksite/comm/h5/images/m_q_title.png)
[单选题]
BD012在封隔器堵水施工中,封下采上的管柱结构为()
A.丝堵+油管+Y445封隔器+丢手接头+单流开关+油管
B.管鞋+油管+Y341封隔器+油管+丢手接头+油管
C.丝堵+油管+Y341封隔器+油管+Y441封隔器+丢手+油管
D.管鞋+油管+Y445封隔器+油管fY211封隔器+丢手+单流开关+油管
![](https://static.youtibao.com/asksite/comm/h5/images/m_q_a.png)
A、丝堵+油管+Y445封隔器+丢手接头+单流开关+油管
![](https://static.youtibao.com/asksite/comm/h5/images/solist_ts.png)
A.丝堵+油管+Y445封隔器+丢手接头+单流开关+油管
B.管鞋+油管+Y341封隔器+油管+丢手接头+油管
C.丝堵+油管+Y341封隔器+油管+Y441封隔器+丢手+油管
D.管鞋+油管+Y445封隔器+油管fY211封隔器+丢手+单流开关+油管
A、丝堵+油管+Y445封隔器+丢手接头+单流开关+油管