enclosed self-ventilated type motor 封闭式自通风电动机

totally-enclosed duct-ventilated type 全闭管通风形

enclosed ventilated type 封闭通风型电机 ; 封闭通风型

pipe-ventilated type 管道通风式

self-ventilated type 自通风式

duct-ventilated type 风道通风式

radial-ventilated type 辐向通风式

forced-ventilated type 强迫通风式