1491.100.30!#$%()犌犅/犜GB1/1T9161996—92—0202008!#$%()+,-犜犲狊狋犿犲狋犺狅犱狊狅犳犪狌狋狅犮犾犪狏犲犱犪犲狉犪狋犲犱犮狅狀犮狉犲狋犲20200929./2021080101(+,-./012./()3/11969—2020目次前言Ⅰ1范围12术语和定义1