Abstract: A precision hand-driven tapping system for use with an inert rotating-spindle machine which is employed for stability and guidance, comprising a wrench body, guide means and non-integral tap adapter and is secured within said machine by its chuck, collett or clamping device. The wrench body has thereon, and out of the tap line-of-sight, handles spaced 120.degree. apart, or a wheel-like device, for applying hand force to rotate the body. A series of tap-holding adapters are used to secure various sized taps by their shanks. Adapters are press-fitted into the wrench body. A machine clamping device holds the system guide means which, in turn, allows the adapter and tap holding body of the wrench to be manually advanced toward a work piece, manually operated to tap it, and to subsequently be retracted and removably secured at the machine clamping device without the machinist removing his or her hands from the wrench.

Abstract: To accomplish the invention, a backing panel is slidably supported on longitudinal rails in turn supported on upright portable frame members. The frame members removably support a header plate and such header plate in turn is arranged to support a wire mesh in suspended relation. Air blown concrete is deposited on the wire mesh against the backing panel to form the wall, the backing panel being movable on its supporting rails progressively as wall sections are formed. The upright portable frame members support a vertical cutter in the form of a continuous power driven wire movable along the front of the newly formed wall to provide a flat, smooth face thereon.