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Yantai Yunsheng Petroleum Machine Accessories Co.ltd
Yunsheng is the manufacturer offering API sucker rod coupling in Shandong China. All produced by 11 B standard. These are very cost effective, including class SM coupling, T Sub Full Size Slim Hole coupling. They available 5/8 ...
Telephone：86-535-6728217Address：Shengquan Industrial Park Laishan Strict
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