Home / Standards / GB/T 20900-2007 GB/T 20900-2007 Active Lifts(elevators),escalators and moving walks - Risk assessment and reduction methodology 电梯、自动扶梯和自动人行道 风险评价和降低的方法 Standard Type GBT ICS 91.140.90 CCS Q78 Status 现行 Issue Date 2007-04-17 Implementation 2007-09-01 Responsible Dept 国家标准委 Drafting Unit N/A