发布时间:2025-01-31 20:28:07
按照现在的天气,只要你在刚刚浇筑混凝土之后覆盖塑料薄膜和毛毡进行养护,基本用不到放水,如果你在硬化后撤除养护措施,觉得水分不足,表面干燥,可每隔五天放次水。一般这个时候的混凝土就不怕冻害了!!!!
能不能告诉pcb的表面处理化金和osp处理的差异以及各自的优越性
2025-01-31 20:28:07 2025-01-31 20:28:07 2025-01-31 20:28:07 2025-01-31 20:28:07 2025-01-31 20:28:07 2025-01-31 20:28:07 2025-01-31 20:28:07 2025-01-31 20:28:07 2025-01-31 20:28:07 2025-01-31 20:28:07 2025-01-31 20:28:07 2025-01-31 20:28:07 2025-01-31 20:28:07基坑支护地下水控制中集水明排降水截水和回灌分别是啥意思解释一下详细点
2025-01-31 20:28:07 2025-01-31 20:28:07 2025-01-31 20:28:07 2025-01-31 20:28:07 2025-01-31 20:28:07 2025-01-31 20:28:07 2025-01-31 20:28:07 2025-01-31 20:28:07 2025-01-31 20:28:07 2025-01-31 20:28:07 2025-01-31 20:28:07 2025-01-31 20:28:07