valving的音标：valving的英式发音音标为：['vælvɪŋ]valving的美式发音音标为：['vælvɪŋ]...

装设阀门...

A new nonlinear variable structure excitation controller and steam valving controller are proposed in this paper.论文提出一种新的非线性变结构发电机励磁和快关汽门控制器....