... power capacity not less than 0.5KVA, have a good grounding, grounding resistance of less than 4Power ... type goniometerDesigned by a round rod lens, sample stage with a load-bearing track, and add a V-bearing guide ... round rod lens, sample stage with a load-bearing track, and add a wheel-type frame, can weight ... crystal rod, the sample plus there is a vacuum suction device platform, the model goniometer ...