The Sheet-Metal Worker's Instructor

alloys base bending blank body bottom centre circle complete cone construct contained copper corresponding cut the line cylinder describe diagonal diameter divide draw a line draw lines draw the line drawn edge effect elevation ellipse envelope equal extend face figure four frustum give given half hammer hand height horizontal inches iron Join joint latter lead length machines mark measure meet metal method obtained operations parallel pattern perpendicular perpendicular line piece pipe plane plate points portion practical PROBLEM produce projection punch pyramid radius raising represent right angles roll round Rule seen semicircle shape sheet shown shows sides slant height solder solid square straight line strike the curve surface take the distance Take the length tapering thick thin transfer triangle various vertical height width