E.Burke Wilford, aeronautical engineer of Pennsylvania and builder of gyro-planes and inventor of the gyro-boat in which he has incorporated some of the principles of the gyro planes. The photo shows the inventor checking the rotor blades and mast of his boat before putting it through test runs in Essington, Pennsylvania. 30/3/1935
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Creative#:
TOP19251721
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達志影像
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RM
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