... ball-and-socket joint 球窝接头；球形铰链连接 ball-and-socket valve 球形阀 ball-bore calibration device 球-孔标定装置 ...
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valve socket 阀座 ; 管座
valve guiding socket 凡尔导向套
socket ball valve 套焊球阀
socket type stop valve 卡套式截止阀
socket-end straight valve 内螺纹联接直通阀
Ball valve with pipe socket 带管座的球阀
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