以下为句子列表：
英文: Model QW50A Air Operated Slips has the features of reliably function, easy in operating and efficient in working.
中文: 该卡瓦具有工作可靠、井口安装方便、操作简便、适用性强等优点。
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英文: Model QW50A Air Operated Slips is a wellhead tools. Mainly used to clipping tubing and drilling rod which raise or put down at well repairing service operation.
中文: QW50A气动卡瓦是油田修井作业时，安装在井口上用于卡紧油管及类似管柱的一种工具。
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英文: The double-clip connected ball valve series could also be applied with the mounted corresponding motor or air operated plant to implement remote control or automatic control.
中文: 本系列对夹球阀可装上相应的电动及气动装置,以实现遥控或自动控制。
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