... SHAWL COLLAR 莱瓜领 POLO SHIRT COLLAR 半开xiōng反领 REVERSE COLLAR 反领 ...
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sweater with reverse collar 翻领运动衫
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A float collar is placed at the top of the float joint and a float shoe placed at the bottom to prevent reverse flow of cement back into the casing after placement.
浮箍是放置于浮动接头之上的,而浮鞋则是放置于浮动接头之下,以防止水泥浆回流到套管内。
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