Tested by 50203ZY drilling team of Zhongyuan Petroleum Exploration Bureau, service time of our valve seat is 4-5 times longer than other brand valve seat.
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山東潤東石油機械有限公司
Tested by 50203ZY drilling team of Zhongyuan Petroleum Exploration Bureau, service time of our valve seat is 4-5 times longer than other brand valve seat.
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