... require professional knowledge and technical skill, the figures point of view, easy to observe, to reduce the reading error, the display can be zero at any ... goniometerDesigned by b round rod lens, sample stage with a load-bearing track, and add a wheel-type frame, can weight 1 ... -30kg,2-6 inches in diameter (can be increased to 8 inches).500mm length of the crystal rod, the sample plus ...