Golf club including stance diagram

作者: Robert S Champion

DOI:

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摘要: A golf club assembly arranged to provide self-guiding indications a user in the correct use of club. The indicating means is provided on distal end hand grip portion and provides display preselected relationship between plurality parameters determining such usage. may be adhesively attached end.

参考文章(3)
Edward A Hennigan, Charles D Goranson, Golf ball including stance diagram ,(1965)
William A Lyon, Golf-teaching instrument. ,(1916)