Do not store full and empty cylinders together.
禁止把满瓶和空瓶存放在一起。
When returning empty cylinders, close the valve before shipment. Leave some positive pressure in the cylinder.
返还空瓶时，在运输之前关闭阀门，使钢瓶内部保持正压 。
When returning empty cylinders, close the valve before shipment. Leave some positive pressure in the cylinder.
返还空瓶时，在运输之前关闭阀门，使钢瓶内部保持正压 。
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