What we're going to get then is mass per unit area.
所以我们的到的是单位面积上的质量。
The density for a flat object would be the mass per unit area.
一个平面物体的密度是每单位面积元的质量。
So these two together, l times rho, give us mass per unit area.
这两个量，l乘以ρ,一起给出单位面积上的质量。
ASTM D5848 Standard Test Method for Mass Per Unit Area of Pile Yarn Floor Coverings.
ASTMD5848簇绒纱线地毯单位面积质量的试验方法。
Leaf fresh mass, water content, leaf mass per unit area, leaf area and pigment of back mutation were approximately the same as green leaves of its red-leaf variations;
②回复突变的红花檵木叶鲜重、含水量、比叶重、叶面积和色素特征等特征均与转绿叶片相似；
Because of the tremendous amounts of energy liberated per unit mass in a nuclear detonation, temperatures of several tens of million degrees centigrade develop in the immediate area of the detonation.
由于核爆时每单位质量所释放的巨大能量，爆炸中心将产生数千万摄氏度高温。
This product is brushing the area per unit mass, and the production process is simple, no special requirements, processing of simple, low processing costs.
本产品单位质量的涂刷面积大，且制作工艺简单，没有特殊要求，加工简单，加工成本低。
The analysis includes the concentration ratio at the base of a GCL, advective and diffusive mass flux, and total accumulated contaminant mass through the liner per unit area.
从衬垫底部浓度比、对流和扩散通量、污染物累积运移量等方面，对污染物在GCL中的运移进行了计算。
The analysis includes the concentration ratio at the base of a GCL, advective and diffusive mass flux, and total accumulated contaminant mass through the liner per unit area.
从衬垫底部浓度比、对流和扩散通量、污染物累积运移量等方面，对污染物在GCL中的运移进行了计算。
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