我乘坐的独木舟船头坐着个男孩，他用一根简单的弹弓、一条橡胶皮带和一块皮垫用石头打鸟。

The boy in the bow of my canoe slapped stones at birds with a simple sling, a rubber thong and a leather pad.

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从马达输出轴上拆卸玻璃框和橡皮垫圈。

Remove the bezel and rubber gasket from the motor output shaft.

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排除：清除杂物，更换已损坏的橡皮垫，改变阀片方向；

Excluded: debris removal, replacement of damaged rubber pad to change the direction of the valve;

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