玻璃四周显露黑色密封边框，适用于周边压条镶嵌安装。
The black seal frame around of glass can be seen, it is suitable for inlaying installation with pressing strip around it.
弹性密封阀门，密封圈可以镶嵌在阀体上或附在蝶板周边。
The elasticity seals completely a valve portal, the hermetic sealing ring can inset on the valve body or attach peripheral at the Die board.
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。
The upper part of the framework guiding support ring is provided with circular ridges, is mutually inlaid and connected with the seal ring.
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