... power capacity not less than 0.5KVA, have a good grounding, grounding resistance of less than 4Power ... direction finderTA-type goniometerDesigned by a round rod lens, samples stage with a load-bearing track, can ... rod lens, sample stage with a load-bearing track, and add a wheel-type frame, can weight 1- ... the crystal rod, the sample plus there is a vacuum suction device platform, the model goniometer ...