模型中考虑了人群密度对疏散能力的影响，改变以往把建筑出口疏散能力视为常数而带来的不能真实反应其疏散能力的状况。
The model considered the influence of the crowd density on the evacuation capability, and the capacity of the egress was taken as a variable rather than a constant as former.
计算结果给出了不同环境压强下推力器的推力、比冲、推进效率和出口平面冲量密度分布。
The results present thrust, specific impulse and thrust efficiency of the thruster under various environmental pressures, as well as impulse density distribution on the exit plane.
该产品专供出口用， 密度高、硬度好、平整且不易变形，是国外客户的理想选择。
The product is used for exports, high density, hardness, and the formation and less deformation is ideal for foreign customers.
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