| 摘要 |
A gauge of lightweight tubular construction for checking the concentricity of a golf ball and the compression of the same having a lever for moving a first anvil a given distance against the ball, the ball moving against a second anvil registering the ball compression against a helical spring on a dial gauge, the handle of said lever being apertured as a go-no-go ring gauge for passage of the ball therethrough as a check on ball concentricity, combined with the direct insertion of the ball therefrom into position between the anvils of the ball compression test device in preparation for a check on ball compression.
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