350r site sewerage, 1969
35r roof drainage and sewerage, 1969
352r roof drainage roof 1st floor, 1969
353r roof drainage roof 2nd floor, 1969
354r roof drainage roof 3rd floor, 1969
355r rainwater overflow roof 4th floor, 1969
356r rainwater overflow roof 5th floor, 1969
357r rainwater overflow roof 6th floor, 1969
358r storm water drainage roof 7th-10th floor, 1969