The Reit patent synchronous device driven by electric brake motor is equipped.
采用瑞图专利同步技术，提升机构由制动电机驱动。
The braking device is provided with a brake between the spring 30 and at least one of the tracks 36, and the brake is used for restricting the movement range of the electric brush along the tracks.
所述制动装置在所述弹簧30和至少一轨道36之间具有一制动器，用以限制所述电刷沿轨道的运动范围。
The utility model provides a brake type shading and protecting device for electric welding, and the utility model is used for protecting the eyes and faces of electric welders.
本实用新型提供了一种电焊工保护眼睛及面部的闸式电焊遮光防护装置。
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