A sound-suppressed, powder-actuated stud driver may include a single-use cartridge assembly and a reusable handle assembly. The clamp contains a longitudinal slot with longitudinal apertures defining first and second detent positions. A solution tank for supplying a flow of cleaning solution to the surface is removably mounted to the handle. The artifact repository stores artifacts required to build the cloud appliance and artifacts that comprise the built cloud appliance. The iron-based sintered alloy is appropriate for use as a valve seat of an internal combustion engine. The camera includes a pressing member for pressing the barrier member from the side of the camera body, and regulating the slide movement of the barrier member in the closing and opening positions.