stripper type preventer 环状橡胶心子防喷器
double ram type preventer 双闸板型防喷器 ; [油气] 双闸板防喷器
Hydril-type preventer 旋转防喷器
ram type preventer 闸板防喷器
annular type preventer 万能防喷器
bag-type preventer unit 筒式防喷器
single ram-type preventer 单闸板式防喷器
bag type blowout preventer 筒式防喷器 ; 筒形防喷器
This type of preventer should only be used as a last resort.
这类防喷器仅应作为最后手段。
Variable bore ram-type blowout preventer, as an improved blowout preventer, is capable of sealing around drill pipes with a range of sizes and has advantages such as low cost and convenience.
可变径闸板防喷器作为新型的闸板防喷器，能够密封一定范围内多种规格的钻具，具有成本低、使用方便等特点。
Variable bore ram-type blowout preventer, the improved type, is capable of sealing drill tools whose sizes are within a certain range, and has advantages of low cost and convenience.
可变径闸板防喷器作为新型的闸板防喷器，能够密封一定范围内多种规格的钻具，具有成本低，使用方便的优点。
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