YB/T 044-1993 Steelmaking graphite material

GB 5689 GB/T 212-2001 Proximate analysis of coal GB/T 212-2008 Proximate analysis of coal GB/T 214-1996 Determination of total sulfur in coal GB/T 214-2007 Determination of total sulfur in coal GB/T 216-2003 Determination of phosphorus in coal GB/T 2007.1-1987 General rules for the sampling and sample preparation of minerals in bulk—Sampling by manual method GB/T 2007.2-1987 General rules for the sampling and sample preparation of minerals in bulk Sample preparation by manual method GB/T 2007.3-1987 General rules for the sampling and sample preparation of minerals in bulk—Experimental method for evaluation of quality variation GB/T 2007.4-1987 General rules for the sampling and sample preparation of minerals in bulk—Experimental methods for checking the precision GB/T 2007.4-2008 General rules for the sampling and sample preparation of minerals in bulk—Experimental methods for checking the precision and bias GB/T 2007.5-1987 General rules for the sampling and sample preparation of minerals in bulk—Experimental method for checking the bias of sampling GB/T 2007.6-1987 General rules for the sampling and sample preparation of minerals in bulk—Determination of moisture content—Heat drying method GB/T 2007.7-1987 General rules for the sampling and sample preparation of minerals in bulk—The method for determination of size by manual sieving GB/T 8170-1987 Rules for rounding off of numberical values GB/T 8170-2008 Rules of rounding off for numerical values & expression and judgement of limiting values GB/T 214-2026 Determination of total sulfur in coal