| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a separation distance measuring apparatus compactible to the degree of not being an obstacle to be carried in patrol on the ground, and having extremely excellent handleability without generating dispersion of a measurement result caused by an individual difference such as a measurer's skill when measuring the separation distance. <P>SOLUTION: This apparatus has a balloon 2 enclosing gas having a smaller specific gravity than the air, and a measure 10 mounted on the balloon and drooping toward the ground when the balloon is floated in the air. <P>COPYRIGHT: (C)2007,JPO&INPIT</p> |
