The disproportion of the oxygen concentration between the inlet and return sides inside the goaf observed in the field is rationally explained from fluidmechanicsprinciple.
从流体力学原理上对现场观测采空区内部进回风两侧氧浓度分布的不均衡给予更合理地解释。
2
Tube Web obstruction property of Roots central vacuum cleaning system is analyzed with fluidmechanics and industry ventilate principle.
应用流体力学和工业通风原理，分析了罗茨中央真空吸尘系统的管网阻力特性；
3
In this paper the general working principles of pneumatic seed-metering device was analysed by tne principle of fluidmechanics.