บริษัท แอสโทร อินสทรูเม้นท์ จำกัด
QC – 621H, the main purpose is for measuring surface treatment of the wear resistant and decolor such as varnishing, electroplating, coating, dyeing and finishing and lens. It can use cotton, sand paper, steel wool and eraser to test specimen of wear condition. This tester can cater various different standard of requirement to set con ? dition for testing such as speed, stroke, specimen appearance, abrasion head and load , and so on.