from The Century Dictionary and Cyclopedia
- n. In a blast- or cupola-furnace, a plate which closes the opening in front through which the molten metal is drawn off, and the slags, etc., are raked out. The tapping-hole is in the middle of this plate.
- n. A curved plate used to prevent a flexible disk-valve from opening or lifting beyond the distance limited by the plate.
Sorry, no etymologies found.