结果表明：在低速条件下渗硫层可显著改善钢表面的抗擦伤性能，且具有较好的减摩耐磨作用。
The results showed that the sulphide layer could improve the anti scuffing property of steel at low speed remarkably, and showed excellent friction reducing and wear resistant effects.
同时利用了回流区内高温、低速、高湍流度等有利于着火的条件的新型煤粉稳燃器。
It can make full use of favourable ignition conditions such as high temperatures in reflow region and low velocity as well as high turbulent scale.
采用了离心力加快沉降速度，粒子的沉降速度大，均匀低速的假设条件不再满足，理论计算模型和实际情况偏差大。
Thirdly, because of the centrifugal force, particles in the magnetorheological fluid sediment at a speed faster than the assumed low and uniform speed in the theoretical sedimentation model.
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