8、nor调速器flyball governor飞球式调速器hydraulic governor液压调速器vacuum speed governor真空转速调速器inertia governor惯性调速器centrifugal governor离心调速器governor weight调速器重锤air cleaner and intake and exhaust system空气滤清器及进排air filter气系统空气滤清器ram air cleaner冲压式空气滤清器thermostatic co