Hinder a little and slowly close butterfly check valve
YANG HAINING, LIAN DEWEN, GUAN JINHUA, KONG LINGLEI, WANG CUNQING, TIAN HONGLIAN
Year of Publication 29.09.2017
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Year of Publication 29.09.2017
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It lags behind to move back to prevent pulls out valve rod butterfly valve
LIAN DEWEN, WANG ZHIGUO, HE YANG, HUAI YANSHAN, AN QINGWEI, REN YANQING, MENG ZHAOPENG, TIAN HONGLIAN, LIU CHUANBING
Year of Publication 08.12.2017
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Year of Publication 08.12.2017
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