| 摘要 |
A support arm for a sunlight concentrating and collecting apparatus of a large size. In such an apparatus, a heavy weight is applied to the support arm. Thus, the support arm becomes large in weight. On the other hand, the mass of the support arm must be minimized so as to track the sun's movement very quickly and smoothly. The support arm is provided with a first member having a curved plate formed substantially in the shape of circular arc, and a second member having an inverted saddle-shaped plate or plates, the second member being firmly fixed along the outer surface of the first member.
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