A generic name given to tools that engage on the outer surface of a tubing string or tool assembly, generally for fishing purposes.
与油管柱或工具装置的外表面相接合的工具通称，一般用于打捞目的。
A generic name given to tools that engage on the outer surface of a tubing string or tool assembly, generally for fishing purposes.
与油管柱或工具装置的外表面相接合的工具通称，一般用于打捞目的。
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