Shandong Changbo Precision Instrument Co., Ltd. was established in 2017 and is a professional enterprise that produces granite measuring instruments and mechanical accessories. We have workshops for mechanical processing, precision constant temperature processing, maintenance, measurement and testing, equipped with large precision stone processing machinery and advanced electronic testing equipment. All products are processed by computer data, including granite precision measuring plates, rulers, square rulers, right angle rulers, square boxes, bending plates, V-shaped blocks, parallel gauges, …