Home / Standards / GB/T 39819-2021 GB/T 39819-2021 Active Conveyor belts—Determination of minimum transition distance on three idler rollers 输送带 三辊托辊最小过渡距离的确定 Standard Type GBT ICS 53.040.20 CCS G42 Status 现行 Issue Date 2021-03-09 Implementation 2021-10-01 Responsible Dept 中国石油和化学工业联合会 Drafting Unit N/A