The occupational exposure limits (OELs) of wood dust in different countries are however not the same.
不同国家的木粉尘的职业接触极限值（或极限值）却不尽相同。
Nine days before the encirclement was complete, a special train of forty-three wagons had arrived from Oels.
包围的九天前被完成时，一个特殊的火车的马车已经到了43从互相联系的。
Nine days before the encirclement was complete, a special train of forty-three wagons had arrived from Oels.
包围的九天前被完成时，一个特殊的火车的马车已经到了43从互相联系的。
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