Spot Welder is used for the dentistry ... greasy dirt etc.3.2 The piece of welder needs to cleanliness, no oxidization, without greasy ... , q_X, h_X three types. The meaning indicates: spot welding, braze welding, backfire welding, press this button ... d) Stand-by state, digital indicate dXX means spot welding mode, no status block between electrodes, press ... the professional personnel in time. Spot Welder