A diaphragm in the plug body ruptures to allow the cement slurry to pass through after the plug reaches the landing collar.

在塞体中的隔膜破裂，以便使水泥浆能在底塞到达止塞箍以后通过。

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The periphery of the plug body, which is far from the plug handle, is provided with a plurality of circular grooves, in which the O-shaped rubber seal ring is embedded.

本发明远离水塞提手的水塞体的外周面上设置若干圈环形凹槽，O形橡胶密封圈卡嵌在环形凹槽内。

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German carmaker BMW - SGL Automotive's only customer and owner of 49% of its shares - uses the material to produce body parts for the main cabins of its futuristic plug-in models i3 Megacity and i8 sports car, which will hit the road in 2013 and 2014.

BBC: Knitting and baking the cars of the future