closing sleeve 中文意思是什麼
closing sleeve
解釋
夾緊套筒-
The hsc - a hydraulic stage cementer features inner closing structure, opening through pressure difference. the closing plug drives the closing sleeve down and then shut circulation ports
型壓差式雙級注水泥器為內關閉式結構,不需投重力塞,通過液體的壓力差打開循環孔,關閉塞帶動關閉套下行關閉循環孔。
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