介壳灰岩层薄、致密、非均质性强，属低孔、低渗孔隙—裂缝性储层。
The shell limestone is thin bed, compact and anisotropism, so the reservoir is of low porosity, low permeability and pore fracture character.
应用：适用于非合金钢、合金钢、灰口铸铁、球墨铸铁、可锻铸铁的深孔钻削，尤其适合铝合金和镁合金的加工。
Application: Drilling deep hole in non alloy steel, alloy steel, grey cast iron, malleable cast iron, special aluminum or magnesium alloy.
火山灰中的细小玻璃态物质，会融化然后堵塞住散热孔，导致引擎过热熄火。
Volcanic ash can clog up and damage jet engines while the tiny particles of glass in the ash can also melt and block the ventilation holes which can cause the engines to overheat and stop working.
火山灰中的细小玻璃态物质，会融化然后堵塞住散热孔，导致引擎过热熄火。
Volcanic ash can clog up and damage jet engines while the tiny particles of glass in the ash can also melt and block the ventilation holes which can cause the engines to overheat and stop working.
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