But stainless steel tube outer wall and the outer wall of the copper pipe which pipe bead setting more is still unclear, but can say two pipe wall mostly film condensation.
但不锈钢管外壁和铜管外壁哪种管材的珠状凝结更多尚不清楚，但可以说两种管材外壁大部份是膜状凝结。
2
A novel solar desalination unit with vertical tube falling film evaporation and horizontal tubecondensation was designed.
设计了一种竖管降膜—横管冷凝的太阳能海水淡化装置。
3
Spirally corrugated and sawtooth-shaped fin tube is a high performance condensation heat transfer tube.