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Location：Kenli JinXiu Petroleum Machinery Co., Ltd. < News
· Application of coaxial double hollow sucker rod in heavy… 关注数：6247  2017-11-16 14:23:27
· Daqing pumping rod manufacturing technology creates a gr… 关注数：979  2017-11-16 14:21:58
· Application of closed cycle heating energy saving techno… 关注数：967  2017-11-16 14:20:13
· Breakthrough of carbon fiber continuous sucker rod techn… 关注数：1145  2017-11-16 14:17:52
· The new generation fiberglass reinforced plastic sucker … 关注数：1137  2017-11-16 14:13:40
· Petroleum machinery company focused on improving product… 关注数：1095  2017-11-16 14:08:32
· Dongying city speeds up the pace of "going out" around i… 关注数：1241  2017-11-16 14:07:48
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