GB/T 34496-2017 Catalyst for heavy-duty gas engine vehicle exhaust purification

GB 20890 GB/T 2828.1-2003 Sampling procedures for inspection by attributes—Part 1:Sampling schemes indexed by acceptance quality limit(AQL) for lot-by-lot inspection GB/T 2828.1-2012 Sampling procedures for inspection by attributes—Part 1:Sampling schemes indexed by acceptance quality limit(AQL) for lot-by-lot inspection GB/T 5181-2001 Automotive emission—Terms and definitions 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 15089-2001 Classification of power-driven vehicles and trailers GB/T 17803-1999 Designation system for rare earth products GB/T 17803-2015 Designation system for rare earth products GB/T 23277-2009 Chemical analysis methods of catalysts containing precious metals—Determination of platinum,palladium and rhodium in automobile exhaust-purifying catalysts—Spectrophotometry GB/T 25994-2010 Honeycomb ceramics HJ 509-2009 Determination of platinum, palladium, and rhodium in automotive ceramic catalytic converters using inductively coupled plasma emission spectroscopy and inductively coupled plasma mass spectrometry GB 17691-2018 Limits and measurement methods for emissions from diesel fuelled heavy-duty vehicles（China VI）