The results show that pollutants removal performance of the system constructed by the mixed packing medium with equal volume proportion of bricks and ceram waste is the best of the four systems.
结果表明，以等体积掺混废砖块和废陶获得的混合填料构建的人工湿地系统，在处理含高浓度和低浓度有机污染物的河水时均表现出良好的除污效果。
According to needs and delivery medium, can be used two kinds of mechanical seals and packing seal, and the structure of these two kinds of interchangeability.
根据需要和输送介质，可采用机械密封和填料密封两种，且这两种结构具有互换性。
Packing is an indispensable part as well as a major medium for promotion of the image of an enterprise.
包装是企业形象中不可缺少的一个重要组成部分，是体现传播企业形象的一个重要媒介物。
V type packing structure has been employed to effectively transform the pushing force of the gland flange and the medium pressure into the sealing force against the stem.
阀杆采用V型填料密封结构，V型填料能将填料压盖的压紧力及介质力有效地转化成阀杆的密封力。
Packing density: Amount of information which can be stored on a magnetic storage medium.
密装度：某个磁体贮存媒介所能盛载的资料数量。
Medium west cultural difference will affect the business enterprise to the choice of the packing design.
中西文化差异会影响企业对包装设计地选择。
Mechanical seals and sealing filler sealing has two forms, for high temperature, high viscosity and corrosive medium, choose packing seal.
密封有机械密封和填料密封两种形式，对于高温、高粘稠度及腐蚀性较强的介质，选用填料密封。
At last, the productivity predicting model of the high-pressure packing sand-control well with the transitional zone is established based on the fluid mechanics in porous medium.
最后，根据渗流力学原理建立了更加完善的高压充填防砂井产能预测模型。
At last, the productivity predicting model of the high-pressure packing sand-control well with the transitional zone is established based on the fluid mechanics in porous medium.
最后，根据渗流力学原理建立了更加完善的高压充填防砂井产能预测模型。
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