Anterior lip brush surface, posterior buccal and palatal surfaces of posterior teeth when the tongue, bristles towards the gums, leading-edge beam, that is on the teeth facing up, under the teeth down.
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under the teeth down
在牙齿下面
以上为机器翻译结果，长、整句建议使用 人工翻译 。
When the teeth reaches the top of the equipment, it will turn upside down, the solids picked up by the teeth will drop onto conveyer under its own weight.
当齿耙运转到机器上部时，耙齿翻转，杂物靠自重脱落到容器中或输送机上被送走。
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