| http://www.w3.org/ns/prov#value | - For example, if an arm is constructed by bending one shaft, and at the time of installing equipment and materials such as lighting equipment, a mirror, a camera, or the like to a leading end of the arm, the bent arm is made relatively rotatable with respect to another shaft serving as a holder, it is possible to change the position and the direction of the equipment and materials in the leading en
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