1·Frequent occurred crack crevice phenomenas of air inflation concrete bricks are discussed in the paper, the procreant reasons of the crevice are analysed. A prevention and cure methods are proposed.
文章针对加气混凝土砌块应用中墙体常发生裂缝这一现象进行研究，分析了加气混凝土墙体裂缝产生的原因，并提出了修补与防治措施。
2·Crack and crevice-free contact surfaces.
无裂缝和缝隙接触面。
3·I consider fresh air an enemy and closed with extreme care every crack and crevice in the room Iinhabited.
我曾经认为新风是我们的敌人，为此将房间的所有空隙封住。