percussion-driven piston corer 撞击驱动活塞岩芯采样器
The DTH percussion-compact drilling is a high efficiency technology drilling in soil strata, which use the impact force produced by hammer piston to crush and compact soil.
潜孔锤冲击挤密钻进技术集冲击钻进、振动钻进及空气钻进的优点于一体，钻进效率高，成孔质量好，在土质地层钻进工程中有着广阔的应用前景。
The utility model is composed of a percussion device body, a piston, a percussion spring, a limiting pin, a shutter, a shutter torsion spring, a shutter pin, a torsion spring pin, etc.
它由击发器体、活塞、击发簧、限位销、活门、活门扭簧、活门销、扭簧销等部件组成。
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