As for erasers, a pink pearl and rubber eraser will both be helpful.
至于橡皮，粉珍珠和合成橡胶橡皮都会很有帮助。
Shock eraser insert: thermoplastic rubber core inside a thermoplastic elastomer butt cap is pressure fit into the shaft to reduce frame shock and vibration.
减震插片：拍柄内置热塑性橡胶内核同热塑性弹性体，有效减少球拍震动。
Please repeat the experiment using a wooden ruler, a coin, a pencil and a rubber eraser.
请用一把木尺、一枚硬币、一支铅笔、和一块橡皮，重做这个实验。
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