The basic structure and the seal principles of the hardpacking 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。
2
Results:Multi-function transfusion ware is more suit-abel to medicine mixing and injecting with hardpacking 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。
3
And the pump integrated vertically, so the hardpacking is not easy to deposit, to ensure the long-term use does not affect the precision and the rate of spit.