| 摘要 |
PROBLEM TO BE SOLVED: To provide a semicircular and semihexagonal head bolt capable of being easily handled in a speedier manner.SOLUTION: A bolt capable of being made in a large or small size is very useful. The bolt can become a successful product capable of being widely used in a variety of application ranges. The bolt is an invention indicating a considerable willingness to be turned into actual utilization.SELECTED DRAWING: Figure 1 |
