Cased Secant Piles
关键词：
The casing drilling is obtained by driving a steel siding into the ground in order to protect the whole drilling operation;
Double-walled casings can be used universally, as they are designed especially for transmitting high rotational and vertical forces as created by the rotary drives and oscillators. The use of double-walled casings ensures a flush drill string.
The casing drilling is obtained by driving a steel siding into the ground in order to protect the whole drilling operation;
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