Each cylinder should be labelled and colour-coded. The batch number and/or filling date and expiry date may be on a separate label.
Each cylinder should be labelled and colour-coded. The batch number and/or filling date and expiry date may be on a separate label.
每个气瓶都应贴标签及色标，批号、充气日期及有效期可以出现在另外的一张标签上。