Deck : Deck General - 3223/5076
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| A large valve, usually installed above the ram preventers, that forms a seal in the annular space between the pipe and wellbore or, if no pipe is present, on the wellbore itself is called the __________. |
| A) accumulator |
| B) annulus |
| C) automatic choke |
| D) annular blowout preventer |
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