[国外标准] NFPA 52-1998 Compressed Natural Gas (CNG) Vehicular Fuel Systems
[国外标准] AS NZS 2739-2009 Natural gas (NG) fuel systems for vehicle engines
[国外标准] BS EN 1936-2006 Natural stone test methods Determination of real density and apparent
[国外标准] BS EN 1925-1999 Natural stone test methods Determination of water absorption coefficient by capillar
[国外标准] BS EN 12440-2008 Natural stone — Denomination criteria
[国外标准] BS EN 12407-2007 Natural stone test methods — Petrographic examination
[国外标准] BS EN 12407-2000 Natural stone test methods. Petrographic examination
[国外标准] BS EN 12370-1999 Natural stone test methods Determination of resistance to salt crystallization