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| 21. | Dry gas face seal (DGS) is one of non-contacting mechanical face seals that can be applied to most of |
| 干式气体端面密封(DGS)是一种非接触式机械密封,适用于大多数气体密封场合,了解密封特性尤其是气膜刚度和泄漏量对正确设计密封非常重要。 |
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| 22. | Metallurgical coke supplies most of the reducing gas and heat for ore reduction and smelting. |
| 焦炭是炼铁的重要原料。冶金焦为矿石的还原和熔炼提供大部分还原煤气和热。 |
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| 23. | In terms of volume, most of the natural gas produced is used for fuel, although a substantial amount |
| 从数量看，尽管有相当数量的天然气用作各种合成化合物的原料，但所生产的大多数天然气用作燃料。 |
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| 24. | "There are four Broad classes of turbine: water (hydraulic), steam, wind, and gas. |
| 主要的涡轮机有四种:水力(水能的)、蒸汽的、风力的和气体的。前三种涡轮机最重要的功用是用来发电,而燃气轮机通常应用在飞机上。 |
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