Traditional geothermal plants exploit natural systems in which water seeps down into porous rocks in the ground and emerges back at the surface at a hightemperature.
传统的地热发电厂利用了这样一种自然系统，即水分下降至地壳的渗透岩层中，而后又受热蒸腾到地表。
2
This is not true in oil quenching, when the surfacetemperature may be high during the critical stages of quenching.
但油淬情况就不是如此，因为油淬时在淬火临界阶段零件表面的温度可能仍然很高。
3
Strong erosion: the metal workpieces dip in with high and certain temperature erosion of solution, to remove metal workpieces surface oxides and corrosion things process.