工业和自然通风以及工厂预制塔的设计建议。交叉引用:BS 848:2BS 3170BS 4142BS 4235:1BS 4485:2BS 4485:4BS 4999BS 5000BS 5304BS 5493BS 5512:1BS 5969部分替换BS 4485-1:1969，替换BS 4485:3:1977和BS 4485:3:1977附录1（1978）。

Recommendations for the design of industrial and natural draught, and factory prefabricated towers.Cross References:BS 848:Part 2BS 3170BS 4142BS 4235:Part 1BS 4485:Part 2BS 4485:Part 4BS 4999BS 5000BS 5304BS 5493BS 5512:Part 1BS 5969Partially replaces BS 4485-1:1969 and replaces BS 4485:Part 3:1977 and Addendum No.1 (1978) to BS 4485:Part 3:1977.