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BS 23:1933
Trolley and contact wire and trolley wheel groove for electric traction
被代替
发布日期 :
1946-06-02
实施日期 :
BS 23:1970
Specification for copper and copper-cadmium trolley and contact wire for electric traction
被代替
发布日期 :
1970-06-25
实施日期 :
BS B 23:1991
Specification for copper-aluminium-nickel-iron alloy rods, sections, forging stock and forgings
被代替
发布日期 :
1991-10-31
实施日期 :
BS ISO 23:1993
Cinematography. Camera usage of 35 mm motion picture film. Specifications
现行
发布日期 :
1995-08-15
实施日期 :