The rest of the heat may be allowed to escape, or, for maximum engine efficiency, the steam may be condensed in a separate apparatus, a condenser, at comparatively lowtemperature and pressure.
剩余的热可以排放，或者蒸汽可在单独的冷凝器中于较低的温度和压力下冷凝，以便获得最大的蒸汽机效率。
2
The serious corrosion problem at lowtemperature could be found in atmospheric-vacuum distillation unit, especially in the atmosphere overhead condenser.
常减压装置存在较为严重的低温位腐蚀问题，尤其是常压塔顶冷凝器腐蚀问题更为严重。
3
Brass seamless tube can be used in heat exchanger and condenser, lowtemperature pipe, underwater transportation pipe.