GB/T 20050-2020大型游乐设施检验检测通用要求标准
英文:Inspection and testing specifications of large-scale amusement device—General principles GB/T 20050-2020介绍: 国家标准《大型游乐...
英文:Inspection and testing specifications of large-scale amusement device—General principles GB/T 20050-2020介绍: 国家标准《大型游乐...