US3815910 * Jan 18, 1973 Jun 11, 1974 C Us Raines Plastic filled golf putter with double gooseneck shaft attachment memberUS3815910 1973年1月18日 1974年6月11日 C Raines Plastic filled golf putter with double gooseneck shaft attachment member...
the first noticeable movement in the downswing is with your upper body. If you keep your back to the target as long as possible as the arms drop, you are in a much more powerful position at impact.