形管废热锅炉是如何分类的?基本形式有几种?
参考答案:
U形管废热锅炉是按废热锅炉的安装位置分类的。一般分为立式和卧式两种,其基本形式一般立式多为水管锅炉,卧式多为火管锅炉。
-- Excuse me, sir, smoking in the gas station.
-- Oh, I'm really sorry.
A. doesn't allow B. isn't allowed C. aren't allowed
污水处理场机泵的出口管径一般()入口管径。
A.大于
B.小于
C.不小于
D.不大于