| 摘要 |
<p>PROBLEM TO BE SOLVED: To make a mark piece hard to drop from a conductor holder by forming the marking piece of a mark of a perforated board or a flexible strip- shaped board. SOLUTION: A marking ring comprises a conductor holder 1 and a mark 2 hanging down from the conductor holder 1, and the mark 2 is composed of a mark piece 2a and a coupling piece 2b. Then, the mark piece 2a of the mark 2 is made into a perforated plate, that is, in a mesh form. This way, making the mark piece 2a of the mark 2 into a mesh-shaped perforated board will enable the resistance of the wind that the mark piece 2a receives to be lessened. Therefore, the stress added to the coupling piece 2b or the friction generated in the coupling piece 2b is lessened. Moreover, making the mark piece 2a of a flexible plastic plate will reduce the resistance of wind further. Accordingly, this reduces the resistance of the wind added to the mark piece 2, so the tensile strength added to the coupling piece 2b or the abrasion generated in the coupling piece 2b becomes small, and the coupling piece 2b gets hard to break.</p> |
