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acetylene alarm systems anchor angle attach basement black wires block bolt bottom brace bracket burglar cable ceiling chain link chisel circuit wires clamp closed connect connector continuity tester control box dead-bolt detectors door drill drive bar edge electric eye extinguisher fabric fasten feet fence fire fixture flame floor floor-mat foil frame gate grille handrail heat helper hinge hose inches inset inside install intruder jamb joists knob lamp latch light lock magnet mark mercury-vapor Mercury-vapor lamps metal mortise mortise lock mounting nail needle valve newel open circuit opposite oxygen pane picket pilot holes plastic post-and-rail fence protection puddle pull putty knife ramp safe sash secure sensor shim side slide smoke smoke detector solder spreader stairs stairway steel stretcher bar strike plate strips studs switch tape terminal post tighten top rail torch wall wallboard welding window wood screws