a substance capable of bringing about the reduction of another substance as it itself is oxidized; used in photography to lessen the density of a negative or print by oxidizing some of the loose silver
pipefitting that joins two pipes of different diameter
例句
用作名词(n.)
The bell reducer provides the cyclone action and the boundary layer control.喇叭形异径管产生旋风作用并进行边界层控制。
The large opening of the bell reducer keeps air velocity low thus preventing moisture re-entrainment.喇叭形异径管的大开口度使空气流量保持较低从而避免把水分再次带走。
