Tripod and Bipod
A tripod is a three-legged portable frame or stand used as a platform to support the weight and maintain the stability of another object.An inspector's tripod is a device used to support any of a number of surveillance tools, such as theodolites, total stations, levels, or transits
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There are supports for mounting optical instruments, with adjustable height. In topography they are used in fixing small milestones, miniprisms, for precision measurements.