pitwork means pumping machinery used in a mine. Lexicurio rates it Sui generis — a strength score of 100 out of 100.
Etymology
From pit + -work.
noun
- Pumping machinery used in a mine.“[…] and the remarks attached to each in Lean's report, show the necessity of adverting to the different conditions of the pitwork, in an attempt to estimate with accuracy the relative merit of different engines […]”