1.What\'s the most harmful effect of air bubbles in mortar?
1.砂浆中气泡最有害的影响是什么？
2.Why use waterproofing paint on a wall’s exterior?
2.为什么要在外墙使用防水涂料？
3.Main purpose of installing a vapor barrier in a wall?
3.在墙上安装防潮层的主要目的是什么？
4.Where is a fire wall required?
4.哪些地方需要防火墙？
5.Which is NOT suitable for exterior redwood?
5.下列哪项不适用于室外红木？
6.How many days between scratch coat and brown coat in plastering?
6.抹灰时，从底层抹灰到上层抹灰之间间隔多少天？
7.Days to wait between brown coat and finish coat in plastering?
7.抹灰时棕色涂层和饰面涂层之间需要等待几天？
8.What are the three exterior stucco coats in order?
8.外墙灰泥的三层构造顺序是什么？
9.Post-sandblasting metal surfaces: what’s next?
9.喷砂后的金属表面：下一步是什么？
10.Which term refers to a properly installed vertical wall?
10.. 哪个术语用来描述正确安装的垂直墙体？
