At working positions

critical water capacity

critical water amount for fire suppression

critical value of water injection intensity

Critical thickness of water film

critical soil water content

critical rate of water application

critical period of water requirement

critical liquid water content

critical depth of water

work out at

wear out period

water out level division

out period

Out of lightning-proof level range

out at the heels

out at the elbows

look out a window at some greenery

look at somebody disdainfully out of the corner of one's eye