Jour : 08/14/2026

Complete Analysis of Long-term Precision Changes in Granite Plates (Comparison with Cast Iron by Material, Process, and Operating Conditions) I. Core Conclusions For qualified 00/000 grade Jinan Blue granite plates, under normal constant temperature and standardized usage conditions, the precision drift over ten years is extremely minimal, and significant deformation almost never occurs;However, inferior stone…

Complete Acceptance Standards for 00/000 Grade High-Precision Granite Surface Plates I. Basis of Execution II. Part One: Raw Material Acceptance (Mandatory inspection upon arrival, determining long-term deformation resistance) 1. Hard Requirements for Stone Types Only Jinan Qinghui Longyan / Indian Black Fine-grained Granite are permitted; dyed stones, stratified miscellaneous stones, and porous ordinary marble are…