海南4+1走势图

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Mudanjiang Dongxu Machinery Co., Ltd.
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ZJS type jar intensifier

ZJS type jar intensifier

ZJS type jar intensifier

海南4+1走势图 The ZJS type jar intensifier is a downhole fishing jar designed to increase jarring energy to up jar。 Therefore it must be run in conjunction with CSJ type super jar or YSJ type hydraulic up jar。Its 。。。

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jar tool

      
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