请说出常压塔哪些操作不当,会引起塔底泵抽空。
参考答案:
1、塔底液面过低
2、塔进料含水多,泵产生汽阻
3、封油带水或太轻
4、塔底吹汽开得过猛或者蒸汽带水
Generally speaking, clothing made of man-made fibers is less superior than _______ made of natural fibers like cotton, wool or silk.
A.that
B.this
C.what
D.one
RLC有几种模式,分别有什么功能?