Jour : 03/04/2026

2 Surface Cleaning (Crucial)Use a dust-free cloth/rabbit skin cloth to wipe away floating dust.For oil stains: Gently wipe with anhyd ethanol/isopropanol or neutral cleaner, and immediately dry.Strictly Prohibited:Washing with water, using acidic or alkaline cleaners, wool, sandpaper.Leaving water stains, fingerprints, oil stains, iron filings.

The precision grade of granite flat plates is the core guarantee for the accuracy of precise measurements. The grade classification is centered on flatness tolerance, following the national standards GB/T 20428-2006 and JJG 117-2013. The mainstream grades are 000, 00, 0, and 1. Grade 000 is used for higher precision scenarios, 00/0 grades for general…