| 摘要 |
PROBLEM TO BE SOLVED: To provide one hole type round bolt utilizing its quite superior characteristic, not damaging its thread part, showing a quite simple handling, enduring against hard load, economical, showing a superior keeping power for its performance, small-sized, light weight, less-expensive and full maneuverability, providing a quite speedy handling under application of a free hand and having a quite high anti-salt disaster used at a site near seashore.SOLUTION: This invention has some features of a durable use of long period time, easy handling under a road runner type thought, not damaging its thread part, not requiring additional fastening of the bolt and showing a quite superior bolt.SELECTED DRAWING: Figure 2 |
