磨砾层 Molasse

磨砾岩相 molasse face

砾磨机 pebble mill ; [机] Flint Mill ; bedrock mill

振动砾磨机 [机] vibrating pebble mill

磨面巨砾 faceted boulder

长筒砾磨机 pebble tube mill

磨蚀砾 facetted bolder

磨石砂砾 millstone grit ; coarse sandstone ; millstone gritcoarse sandstone

全砾磨机 all-pebble mill

砾磨 Pebble grinding