GB/T 37600.4-2019全国主要产品分类产品类别核心元数据第4部分:公共游乐场的游乐设施国家标准
英文:National central product classification—Product category core metadata—Part 4: Amusement ride in public amusement par...
英文:National central product classification—Product category core metadata—Part 4: Amusement ride in public amusement par...