选手更换柄皮应该比更换拍线更频繁。 打球时只有干净清爽的柄皮感觉才会好。
Players should replace their tennis racquet grip more often then they have their racquet re-strung. There is nothing like the feel of a clean, fresh grip when playing tennis.
增加惯性力矩的方法是在3点和9点间增加质量，或者使用大的舒适的手柄并经常更换磨坏的柄皮。
Polar moment of inertia can be increased by adding weight at 3 and 9 o 'clock, using the largest comfortable grip size and replacing worn grips regularly.
传统的猎刀一般是木柄，皮柄或者骨柄。
Traditionally, hunting knife handles were made of wood, leather or bone.
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