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| path of material flow (By design the seal valves are always out of the path of material flow to prevent material abrasion, which reduces the probability of a sealing problem. 按照设计，密封阀总是避开料流通道，以避免料流对其的磨损，降低密封问题出现的概率。) | |||
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| path of material flow (By design the seal valves are always out of the path of material flow to prevent material abrasion, which reduces the probability of a sealing problem. 按照设计，密封阀总是避开料流通道，以避免料流对其的磨损，降低密封问题出现的概率。) | |||