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概述了漂卵石、孤石地层桩基施工的特点及现有常用施工方法。阐述了 CFZ- 1 5 0 0型冲击反循环钻机的主要特点、钻进工艺步骤及应用效果
The characteristics of the construction of pebbles and boulders stratum and the commonly used construction methods are summarized. The main features of CFZ-1500 impact reverse circulation drilling rig, drilling process steps and application effects are described