GY-T 120一1995 电视节目带技术质量检验方法.zip-GY-T 120 of a 1995 television program with the technical quality of testing methods. Zip

GY-T 121一1995 有线电视系统测量方法-GY-T 121 of a cable television system, method 1995

GY-T 127一1995 中央、省、自治区、直辖市广播电台和电视台代码-GY-T 127 of a 1995 central, provincial, autonomous regions and municipalities directly under the Central Radio and Television code