basic pad layer concrete

• 垫层混凝土

basic pad layer concrete的用法和样例：

例句

1. The front of the house was faced with concrete.
   房屋正面涂著一层混凝土。
2. For the laminated pouring of mass concrete, the best time slot is close to the time that mass concrete reaches the tiptop temperature.
   对分层浇筑混凝土而言，其最佳分层浇筑间隔时间一般在先浇筑层混凝土达到最高温升的时间附近。