internal flush drill pipe
... internal gas pipe 室内燃气管道 internal pipe coating 管线内涂层 internal flush drill pipe 内平钻杆 ...
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内平钻杆接头 internal flush tool joint
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水井钻杆为外加厚内平式，接头按照石油钻具尺寸加工，也可按照用户要求加工。
Water well drill rod for eue in even -like, attaches according to the petroleum drilling tool size processing, also may defer to the user request processing.
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