Question

adjustable proportional module of outlet​

Answer 1

Crump's Adjustable Proportional Module:
In this type a cast iron roof block is provided by bolts in masonry at the entrance end. This block is given lemniscate curve at the lower end on the entrance side. ... Whole outlet is constructed with masonry. Thus, this outlet is perfectly rigid once the roof block is fixed.

Answer 2

Answer:

Crump's Adjustable Proportional Module:

In this type a cast iron roof block is provided by bolts in masonry at the entrance end. This block is given lemniscate curve at the lower end on the entrance side. ... Whole outlet is constructed with masonry. Thus, this outlet is perfectly rigid once the roof block is fixed.