... & waist automatic, continuously and intermittent by PCL controll Traction Bed JHDQ-00A Function This product is designed for cervical vertebra ... consists of digital tube display console, the main traction bed, cervical traction frame, swing bed top, etc, JHDQ-00A, without swing bedtop ... conditions: a) Environmental temperature: 5°C~40°C b) Supply voltage: AC220V±22V,50Hz±1Hz c) Atmospheric pressure: 70 ...