TURBOPIER
POWER OPERATED CONSTRUCTION TOOL INJECTING AND EXTRACTING VARIOUS GRANULAR, FLUID AND SEMI-FLUID MATERIALS INTO AND FROM A GROUND SURFACE AND OTHER TYPES OF SURFACES, MADE UP OF INTERCONNECTING TUBULAR MEMBERS WITH A SELF-ADVANCING HELIX AND DRILL BIT
Cancelled · March 3, 2003 · 76496430 ·