标准号:IS 1726 Pt.7/Sec.1-1974
发布日期:1974/9/1 12:00:00
实施日期:1999/12/31 12:00:00
适用范围:This standard ( Part VII/Section 1) lays down the requirements cf materials, dimensions, tolerances, weights and marking of light duty square type with single seal manhole covers and frames.