GB/T 31530-2015 Low-level mercury catalyst for chloroethylene synthesis

GB/T 6003.1-2012 Test sieves—Technical requirements and testing—Part 1:Test sieves of metal wire cloth GB 190-1990 Labels for packages of dangerous goods GB 190-2009 Packing symbol of dangerous goods GB/T 191-2000 Packaging—Pictorial marking for handling of goods GB/T 191-2008 Packaging—Pictorial marking for handling of goods GB/T 603-2002 Chemical reagent—Preparations of reagent solutions for use in test methods GB/T 603-2023 Chemical reagent—Preparations of reagent solutions for use in test methods GB/T 6678-2003 General principles for sampling chemical products GB/T 6679-2003 General rules for sampling solid chemical products GB/T 6682-1992 Water for analytical laboratory use—Specification and test methods GB/T 6682-2008 Water for analytical laboratory use—Specification and test methods GB/T 7702.2-1997 Standard test method for granular activated carbon from coal—Determination of particle size GB/T 7702.3-1997 Standard test method for granular activated carbon from coal—Determination of hardness GB/T 7702.3-2008 Test method for granular activated carbon from coal—Determination of hardness GB/T 7702.4-1997 Standard test method for granular activated carbon from coal—Determination of apparent density 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 191-2025 Graphical symbols marking for handling and storage of packages