作废
BS 7777-4-1993 低温用平底、立式、圆柱形储罐.储存液态氧、液态氮和液态氩的单层密封罐的设计和制造规范Flat-bottomed, vertical, cylindrical storage tanks for low temperature service - Specification for the design and construction of single containment tanks for the storage of liquid oxygen, liquid nitrogen and liquid argon