| 释义 |
plug-and-feather method plug-and-feather method[¦pləg ən ′feth·ər ‚meth·əd] (mining engineering) A method of breaking large quarry stones into smaller blocks; a row of holes is drilled in the stone along a line where the break is desired; a pair of feathers (semicircular cross-section rods) is inserted in each hole; a plug (steel wedge) is inserted between each feather pair; the plugs are hammered in succession until the stone fractures. |