If the valve is faulty, attach a label or tag to the cylinder identifying the problem and return the cylinder to the supplier.
如果阀门有故障，给钢瓶贴上标签或标志说明问题，然后把钢瓶返还给供应商。
If the valve is faulty, attach a label or tag to the cylinder identifying the problem and return the cylinder to the supplier.
如果阀门有故障，给钢瓶贴上标签或标志说明问题，然后把钢瓶返还给供应商。
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