循环水滤网的投运步骤及注意事项是什么?
参考答案:
1)检查滤网具备投运条件;
2)缓慢开启滤网进口门;
3)开启滤网出口门;
4)关闭高滤网旁路门,注意冷升水压力变化。
—Oh, no. Our school football team lose again.
—They won't win _____ they practice more.[ ]
A. if
B. unless
C. when
D. because
热电势修正法是根据中间导体定律来对热电偶自由端进行温度补偿的。