... 胀圈离合器 expansion ring clutch 胀圈密封 expansion ring seal 胀式制动器 expanding brake ...
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Manufactured by casting polyurethane, main seal ring used in expansion ring testing device for pipeline was designed.
采用浇注型聚氨酯材料，设计了一种管道用胀环试样试验台主密封圈。
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