... 种新型上盖密封材料 seal material 上密封座 upper seal support ; back seat 上密封筒 upper seal bore ...
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The upper part of the framework guiding support ring is provided with circular ridges, is mutually inlaid and connected with the seal ring.
骨架导向支撑环的上部设有环形凸棱并与密封圈相镶嵌连接。
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