The vapour cone effect is caused by pressure differences around the aircraft. A sudden drop in pressure associated with high speed allows water vapour, which is normally invisible, to condense as fog.
蒸汽锥效应是由于战斗机周围的压力差所导致的，高速飞行时压力的陡然降低会使不可见的水蒸气凝结成雾气。
Reducing the gas pressure also brings about a sudden drop in temperature, typically from 10c to -30c.
减低气压也会带来温度的骤降，通常是从10度降至零下30度。
Suitable means shall be provided to prevent back flow of water into steam pipes in case there is any sudden drop in steam pressure.
适当是指应能达到防止水回流到蒸汽管内，导致任何的气压突然下降。
Suitable means shall be provided to prevent back flow of water into steam pipes in case there is any sudden drop in steam pressure.
适当是指应能达到防止水回流到蒸汽管内，导致任何的气压突然下降。
应用推荐