gbt12496.13 1999, gbt17799.1 1999, gbt 12496.5 1999, gbt 12496.7 1999, gbt177701999, gb/t1999, gb/t17836, GB/T 17836-1999, GB/T 17836, gbt 11348.1 1999, GB T 11885 1999, gbt 12496.2 1999, gbt 12496.3 1999, gbt 12496.8 1999, gbt 12496.9 1999, gbt 17836 1999, GB T 17836-1999, gb t17836-1999, gb t17836一1999, GB/T 1999.
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