喷气口 meaning in English

air nozzle
gas vent
jet exhaust
orifice
puff port
tuyere

This is done by a great number of ring shaped air jets on the bottom of the craft .
这是靠船底上的许多环形喷气口来做到的。
Results indicated that the friction reduction of ship flat bottom is proportional to the air injection ratio and adversely proportional to the distance from the injection
计算结果表明，平底船的减阻率与喷气率成正比，而与离喷气口距离成反比。
The results predict the local friction reduction increases with the air injection ration hut decreases with the distance - away from the injection , which is in conformity with experiments
结果预示，随着喷气率增大，局部减阻率增加，但离喷气口的距离越远，局部减阻率减小。