词汇	sign of evolution
释义	sign of evolution 根号
随便看	feed water ion exchanger feed-water level feed-water level control feed water level regulation feed-water level regulation feedwater line feedwater-line feed water line feed-water line feedwater line break feedwater line break accident feedwater line startup sludging feedwater main feed-water main feedwater makeup feed-water makeup feed-water make-up feed-water manifold feedwater nozzle feed water of boiler feedwater oxygenated treatment feed-water penetration isolation valve feedwater pipe feed water pipe feed-water pipe