The filled PTFE was suggested to be used as the material of water bearing of ZL type water pump in consideration of its working conditions, The paper also deals with the structural design of bearing.

根据ZL型水泵的水轴承工作条件，提出利用填充聚四氯乙烯作为水轴承材料，并介绍轴承的结构设计。

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This invention concerns the technology of making inkstones for calligraphers and painters. The clay bearing water or the clay deposited therefrom will be used as raw material.

本发明为书法、绘画工具――砚台的制造工艺以及一种具有保湿效果的澄泥砚。

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