细砂质磨石 buhrstone（bustone） 细石器；微晶 microlith细碎矿脉带 stringer lode细铁橄榄岩 fayalitfels细土 fines细纹层 laminite细硅线石 fibrolit...
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buhrstone mill 磨盘式磨粉机 ; [机] 硅石磨盘
buhrstone e 磨石
buhrstone e mill 磨盘式磨粉机
underdriven buhrstone mill 底动石膏
over-driven buhrstone mill 上动细纱质石磨
N a hard tough rock containing silica, fossils, and cavities, formerly used as a grindstone 硅质磨石
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