An optical device, such as a pair of field glasses or opera glasses, designed for simultaneous use by…
A cleaning implement for sweeping; bundle of straws or twigs attached to a long handle
Lifts and moves heavy objects; lifting tackle is suspended from a pivoted boom that rotates around a…
optical instrument consisting of a frame that holds a pair of lenses for correcting defective vision
A safety device that protects an electric circuit from becoming overloaded. Fuses contain a length of…
A machine that separates the seeds, seed hulls, and other small objects from the fibers of cotton.
An apparatus in which environmental conditions, such as temperature and humidity, can be controlled,…
Machines cut material off moving strips, usually metal, but also leather or laminates, to leave a desired…
A type of magnet whose magnetic field is produced by the flow of electric current. The magnetic field…
An instrument that converts voice and other sound signals into a form that can be transmitted to remote…