Home / Standards / GB 23561.1-2009 GB 23561.1-2009 Methods for determining the physical and mechanical properties of coal and rock — Part 1: General requirements for sampling 煤和岩石物理力学性质测定方法 第1部分:采样一般规定 Standard Type GB ICS N/A CCS N/A Status N/A Issue Date N/A Implementation N/A Responsible Dept N/A Drafting Unit N/A