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Terms for subject Drilling containing crossover | all forms | exact matches only
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crossover circulation反循环洗井
crossover coupling过渡接头
crossover coupling配合接头
crossover point滚筒上钢丝绳上下层交叉点
"crossover" section滚筒上钢丝绳上下层交叉点
"crossover" section滚筒上的钢丝绳上下层之间的交叉点
crossover sub配合接头
crossover sub不同类型或尺寸的接头间的过度接头
hydraulically operated crossover mechanism液控转换机构

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