According to the comparison of several impervious films, the dependability and application of high density polyethylene (HDPE) film at city waste sanitary landfill were expounded in this paper.
通过对几种防渗膜的性质比较，阐述了高密度聚乙烯(HDPE)膜用于城市生活垃圾填埋场的可靠性及应用情况。
Shaving board adhesive consists of mixed modified waste liquid and UF resins. Proper process can make the shaving board be of suitable strength and property density.
改性的麻杆黑液与自制脲醛树脂按一定比例调配作为刨花板粘合剂，选择适当的工艺条件，将麻芯与刨花的混合料压制成具有一定强度、适当密度值的板材。
The test results also show that apparent density, Marshall stability, resistance to rutting and skidding of samples containing waste glass are slightly lower than those without waste glass.
掺加一定比例的废玻璃对沥青混合料的设计沥青用量影响不大，但会降低沥青混合料的密度，并使沥青混合料试件的马歇尔稳定度、抗车辙能力和抗滑性略有降低；
Because of the high density of sensor nodes in WSN, there are quantities of redundant sensor nodes. All sensor nodes working simultaneously will lead to great waste of energy.
由于传感器网络中节点密度大，网络中存在大量的冗余节点，全部节点同时工作会浪费大量能量。
The sediment discharge of rivers with cultivated waste land of dry farm, population density are indirect proportion, it with forest cover degree, per capita output of grain are inverse proportion.
河流输少量与旱坡耕地垦殖率、人口密度成正比，与森林覆盖率、人均占有粮食成反比。
The waste pulp with light weight but big shape can be re-constructed into high density material, which turns to be a new building material for research.
自重轻、体积大的废浆可以重构为高密集物质，成为可研究性的建筑新材料。
Through the analysis of the existing test results in China, it is found that the dry density of solid waste is the key influence factor of strength and has good relation with the strength behavior.
经过国内相关试验成果的分析，得到垃圾土的强度参数主要受干密度的影响，且有较好的相关性。
And within the range of certain density, the adaptability of change of the density of the waste gas is good.
且在一定浓度范围内，对废气浓度变化的适应性好。
And within the range of certain density, the adaptability of change of the density of the waste gas is good.
且在一定浓度范围内，对废气浓度变化的适应性好。
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