The basic structure and the seal principles of the hard packing were presented, and the formula of specific pressure was given.

介绍了硬填料密封的基本结构及密封原理，给出了比压计算式。

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Results:Multi-function transfusion ware is more suit-abel to medicine mixing and injecting with hard packing or soft packing and open or close packing.

结果：多功能输液器适用于硬包装、软包装及密闭式、开放式静脉用药的配制与输液。

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And the pump integrated vertically, so the hard packing is not easy to deposit, to ensure the long-term use does not affect the precision and the rate of spit.

当胶水含有较硬的填料时，必须采用耐磨泵，而且泵部整体竖直放置，使硬质填料不易沉积，使用维护更加方便，保证长期使用不影响吐出精度及比率。

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When FDR turned toward the use of hard power after the 1936 elections, with a court-packing plan that would have added more liberal justices to the Supreme Court, the opposition to the White House increased, and FDR encountered more trouble reaching his goals.

CNN: Commentary: Obama can learn from Bush's failures