| http://www.w3.org/ns/prov#value | - If the first to third angle wires 14, 16, and 18 and the first to third wire holders 20, 22, and 24 are arranged at positions shifted from the three equidistant angular positions, a bending operation can be accurately performed in the four directions, i.e., the upward, downward, left, and right directions, and other arbitrary directions by controlling the ratio between the pulling forces of the fi
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