精密深孔钻孔工具
precision deep hole drilling tool
浅基础基础埋置深度
embeded depth of foundation
灌注桩基础
impregnate pile foundation
grouting piles
人工挖孔桩基础
manual-excavated pile foundation
挖孔桩基础
Dug pile foundation in tunnel
桩基钻孔
Drilling for file foundation
冲击式深孔钻机
long-hole percussive machine
大桥深基础
deep foundation of bridge