draft guage [= draft indicator]
apparatus distilling apparatus
adjust the ship’s draft
adjustment of the ship’s draft
aerating test to draft tube
air draft
气流
吸风
通风
抽风
净空高度
空气通风
水上高度
净空高度水上高度
水线到舱口围顶的距离
air draft operation automation
air heater draft losses
air seal type clean draft chamber