标准号:IS 6315-1971
发布日期:1972/4/1 12:00:00
实施日期:1999/12/31 12:00:00
适用范围: This standard covers the requirements for concealed type floor springs (hydraulically regulated ) for vertical doors weighing not more than 125 kg. In case of doors consisting of more than one leaf the weight of each leaf shall not exceed 125 kg.