由继电器、电子管、离子管等所组成的点焊断续器,在几年前还算是较为先进的电子设备,但它与我国新兴发展起来的晶体管半导体器件相对比,存在如下的差距:如体积大、重量重、耗电量大、工作不耐久、不可靠、不方便、检修维护均较困难.尤其继电器触点还必须经常予以整修和清擦,稍有接触不良,就会使整个断续器失控,而不能 By the relay, tube, ion tube consisting of spot welding interrupter, a few years ago is still considered as more advanced electronic equipment, but it with our newly developed transistor semiconductor devices, there are the following gaps: such as the volume Large, heavy weight, power consumption, work is not durable, unreliable, inconvenient, overhaul and maintenance are more difficult. In particular, the relay contacts must also be regularly refurbished and clean rub, a little bad, it will make the entire intermittent Out of control, but not