blue sheet meaning in English

发蓝退火的薄钢板
蓝钢皮

These blue sheets also show the relevant date as of which the texts of individual legislation are up to date
这些蓝色页显示个别法例文本切合某一日期( "最后正确日期" )的法律情况。
The date of the latest issue is shown in the master check list and instructions located at the beginning of volume 1 ( the blue sheets )
最新一期活页版的日期，刊于第1册开首处的总核对表及指引(蓝色页) 。