handheld drill การใช้

• Gloria is brutally murdered by the Indian with a huge handheld drill.
• Even on many drill presses, handheld drills, and lathes, which have collet chuck ), the chuck is attached by a taper.
• Vreeland and his colleagues, working from a cage suspended in the shaft, used a battery-powered handheld drill that was thoroughly sterilized to extract a core of rock containing salt crystals no bigger than postage stamps.
• It is credited to Arthur James Arnot and William Blanch Brain of Melbourne, Australia who patented the electric drill in 1889 . In 1895, the first portable handheld drill was created by brothers Wilhem & Carl Fein of Stuttgart, Germany.