| 摘要 |
PROBLEM TO BE SOLVED: To provide a marker for practice to help an user's driver precisely go over the swing orbit starting from swinging back on plane. SOLUTION: A fluorescent reflection tape 2 is stuck on one of the face of the side face of a rectangular column 1, made of a material, light, hard and having an abundance of restoring force. A base 3 shaped to be fit to the driver's surface is disposed and a square column 1 stuck with the fluorescent reflect tape 2 is fixed on the base 3. And the base 3 is fixed on the surface of the driver.
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