... releasing socket 可退打捞筒 releasing spear 可退打捞矛 releasing spring 放松弹簧 ...
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flush type releasing spear 冲洗型可退式打捞矛
rotary releasing spear 螺旋松紧式捞管器
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Use releasing spear or releasing collar to fish the tubing.
用可退式捞矛或打捞筒打捞油管。
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