盾构机操作前,应进行哪些参数的设置?
参考答案:
(1)泡沫系统参数设定;
(2)报警温度及注浆压力值设定;
(3)设定盾构的掘进状态参数;
(4)盾尾油脂密封参数设定。
拱和拱顶砌筑时,不得在拱脚砖后面砌筑()。
A.致密性耐碱砖
B.隔热耐火材料
C.致密性耐酸砖
D.硅藻土砖
E.致密性中性砖
There are already some specialized organizations established and operated to help the patients of OCD. True False