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Vernier Caliper dial Soil Testing Equipment Description: A measuring tool, composed of a main ruler and a vernier, is used to measure the length, internal and external diameter and depth, and has the functions ...
... scale/vernier for geting the exact faceting and angle of the gem. Material Cupper and Aluminum Alloy Index Wheels 96 and 64. Description: 1.convenient to observe the gem processing when cutting and grinding...