| 摘要 |
<p>554,615. Illuminating systems. FAIRBROTHER, H. K. Sept. 11, 1942, No. 12826. [Class 75 (iv)] Areas are illuminated by one or more reflectors 2 supported above the area by one or more captive balloons 1 and reflecting the light from searchlights 10 arranged adjacent the ground.</p> |
