| 摘要 |
A device and system for the purpose of exercise and/or physical therapy through use of a primary vessel of pliable plastic material that forms a hollow main body portion at least partially filled with liquid and a second portion in an integral unit with the main body portion and filled with gas or air reservoir of an entrapped volume compressible under pressure of compressive force applied to the main body portion for exercise and therapy involving a finger, fingers, hands, arms, shoulder, chest muscles, jaw, knee, elbow and the like.
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