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义;The equipment should cleanse usually, keep it clean, it need not has muddiness and seeper.
设备应经常擦拭，保持清洁，不许有泥污积水。
The equipment should cleanse usually, keep it clean, it need not has muddiness and seeper.
设备应经常擦拭，保持清洁，不许有泥污积水。
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