After partition the pipe into calculation cells, the sound velocity, fuel density, fuel pressure and flowing velocity at every calculation crunode in different time are gained.

在对油管合理地划分计算单元后，可求解得到油管各个结点在不同时刻的燃油音速、密度、压力和流速等特征参数值。

youdao

Elastic mid-strength rock wool board: used for heat preservation, fireproofing and sound absorption for the building wall/roof, such as curtain wall, inner wall partition and elevator hoistway, etc.

有弹性，中等强度岩棉板：适用于建筑墙体/屋顶保温、防火、吸音，如幕墙、内墙隔断、电梯井等。

youdao

Sound insulation effect is good, the partition wall has a very good sound insulation effect.

隔音效果好，隔间墙具有非常优良的隔音效果。

youdao