它将封隔器与伸缩管设计成一体，采用V形膨胀石墨密封圈组成密封系统，确保伸缩管热力伸长时封隔器的密封性。
The packer and telescopic tube are designed to a whole body and V-shaped inflatable graphite sealing ring is used to form the sealing system, ensuring the sealing performance of.
耦合金属封装件是一整体管结构，或由激光器固定管体、耦合过渡管、以及外封管组成。
The coupling metal packaging piece is of an integral tube structure, or formed by a laser fixing tube body, a coupling transition tube and an outer packaging tube.
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