Electric fan, Powerful fan, Ventilating fan, etc. are our main products.

电风扇，强力风扇，换气扇等，是我们主要的产品。

This company specialized production washer, dehydrator, electric fan, warm air blower, ventilating fan , series product and so on .

本公司专业生产洗衣机，脱水机，电风扇，暖风机，换气扇，通风器等系列产品。

The utility model relates to a power switch used for a ventilating fan and a special pulling switch used for the closure and the linkage of shutter blades.

本实用新型是一种用于换气扇的电源开关和百叶闭合连动的专用拉线开关装置。

A ventilating fan, a lighting lamp, a diving circulating pump and an automatic thermostat are arranged in the box body. A bonding type thermometer is arranged on the box wall.

箱体内还设有排风扇、照明灯、潜水循环泵、自动恒温器，箱壁上设有粘贴式温度计。

The paper introduces the working principle of which frequency control technology is applied in energy-saving reformation for ventilating fan. The frequency control system was designed in detail.

介绍了利用变频调速技术对通风机进行节能改造工作原理及系统设计。