breast hole

breast hole

[′brest ‚hōl]
(metallurgy)
A hole for raking cinders out of a smelting cupola.
References in periodicals archive ?
Because women had to return to work so soon after giving birth, they even made arrangements that allowed them to continue nursing their offspring - by inserting a hatch in the nursery that covered a 'breast hole'.
The burden between breast holes and trim holes is 1.25 times the spacing between trim holes.