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.
他们在平稳条件下、高低速时、城市里、人口密集的城市，高速公路环境下都分别测试了iPhone 4。
They tested iPhone 4 while stationary, at high and low speeds, and in urban, dense urban, and highway environments.
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.
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