JM-4启闭风门绞车用于煤矿扇风机风流换向时启闭风门和闸门。
绞车结构简单，维修方便。既可电机驱动，又可手动操作，绞车电机、电控设备具有隔爆和非隔爆型两种，按用户需要供给。
The series JMB air door winch for opening and closing the air doors
The model JMB air door winch is used for opening and closing the air doors and throttle valve in coal mine when changing the direction of air current of the blower.
The winch has simple structure,is easy to maintain.It can be droved by motor or operated by hand.The motor and electric control has two kinds i.e. explosion-proof type and non-explosion-proof type,can be supplied according to the needs
