... child with clutch to shift more stable and reliable. 2. Jaw plates, floating body, clamping teeth, and other ... first, free undocked from the drill pipe, mobile. 7. Main dorsal clamp and clamp a combination pliers, without deduction on ... Could not stop shifting to regulate high-low; clamp can be the first to have the greatest positive ... pliers. 11. Optional hydraulic hoists extinguishers. drill pipe clamp