604084-A/B/C Manual Vertebra Traction bed adopts the combination of the worm gear and endless screw mechanical transmission device and mechanical tensile metering device.It has the features such as low price,reasonable design,firm structure,fine securty and reliability,convenient operation etc.It is applicahle for the medium and sizes of the hospitals and community recovety center.Tise product has the high social and economical benefits.It has sound curing effect to treating the cervical vertebra disease and lumbar vertebra disease