当锅炉采用自动调节水位时,锅筒中水位应保持在()±50mm。
参考答案:正常水位线
88. We wanted to buy a bigger house than this but we had to cut our according to the cloth.
A.clothing
B.clothes
C.dress
D.Coat
冷轧厂酸轧机组轧机焊机形式为全自动闪光焊机。