Seepage control in dam, design of freezing resistance for concrete face slab, new caulking water sealing material and surface coat on face slab are mainly presented.
本文重点介绍坝体渗流控制，混凝土面板抗冻设计，及新型嵌缝止水材料，面板表面涂料的研究。
2
He had on a long trench coat that was almost in shreds and a hat topped his head, pulled down so you could not see his face.
他穿着一件破烂不堪的军大衣，头上斜扣着一顶帽子，几乎遮住了整张脸。
3
The Toaster wears a black hat and coat and hides his face with a hood or scarf.