空冷器投用步骤
参考答案:
(1)投用前对空冷器进行全面检查;
(2)盘车;
(3)关闭百叶窗,将风扇叶轮调节到最小角度;
(4)启动马达;
(5)空冷器投入使用。
I was halfway back to the hospital where the doctor was working Susan caught up with me.
A.when
B.while
C.until
D.though
某隧道采用复合式衬砌,二次衬砌采用模筑台车施工,施工完后发现施工缝处有水渗出,试分析原因并采用何种方法以解决渗水?