DTH Retractable Segment Bits

N'ụlọ ọrụ ndoro na ụlọ ọrụ geotechnical, akara ndoro nwere ike ịgbanwe ma ọ bụ nke nchịkwa n'ime akara ndoro nwere ike ịgbanwe ma ọ bụ nke nchịkwa n'ime akara ndoro nwere ike ịgbanwe ma ọ bụ nke nchịkwa n'ime akara ndoro nwere ike ịgbanwe. Akara ndoro ndoro ndoro ndoro ndoro ndoro ndoro ndoro ndoro ndoro ndoro ndoro ndoro ndoro ndoro ndoro nwere ike ịgbanwe ma ọ bụ nke nchịkwa n'ime akara ndoro nwere ike ịgbanwe ma ọ bụ nke nchịkwa n'ime akara ndoro nwere ike ịgbanwe. Akara ndoro ndoro ndoro ndoro ndoro ndoro ndoro ndoro ndoro ndoro ndoro ndoro ndoro ndoro ndoro nwere ike ịgbanwe ma ọ bụ nke nchịkwa n'ime akara ndoro nwere ike ịgbanwe ma ọ bụ nke nchịkwa n'ime akara ndoro nwere ike ịgbanwe. Akara ndoro ndoro ndoro ndoro ndoro ndoro ndoro ndoro ndoro ndoro ndoro ndoro ndoro ndoro nwere ike ịgbanwe ma ọ bụ nke nchịkwa n'ime akara ndoro nwere ike ịgbanwe ma ọ bụ nke nchịkwa n'ime akara ndoro nwere ike ịgbanwe.