Camera sympathising and auxiliary equipment and 3m aluminum alloy small truss camera horizontal positioning system fixed on the camera horizontal positioning system beam, the upper camera horizontal positioning system fixed in the 24m aluminum alloy small truss, the upper camera horizontal positioning system beam can be regarded as supporting in the 24m aluminum alloy small truss simple support beam calculation, aluminum alloy small truss horizontal spacing for L 2.2m, the maximum length of the cantilever part is L -0.4m.
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