articulated structure
A structure which permits relative motion to occur between its parts (e.g., by means of one or more sliding or […]
A structure which permits relative motion to occur between its parts (e.g., by means of one or more sliding or […]
Light provided by an artificial source which has a spectral distribution approximating that of natural daylight at a correlated color
A device for indicating the horizon, as a bubble, pendulum or the flat surface of a liquid.
A relatively permanent object used to identify the location of a survey station or corner.