v.預熱
The processes of preheating and welding of super scale penstocks were detailed. 本文詳細敘述了巨型壓力鋼管的預熱裝配和焊接過程。
Condensate from the first-effect calandria is used for preheating the feed. 一效列管換熱器中出來的冷凝液被用來預熱進料。
