计算机控制时,蝶阀不变色的原因?
参考答案:
⑴接触器无反馈信号,通知仪表处理。⑵推板不到位,调整推板。⑶气缸损坏,通知仪表修理。⑷气源压力低,通知调度,提高仪表压力。
______ of the workers in the computer factory is about two thousand, and ______ of them are women workers.
A.The number; second third
B.A number; three quarters
C.A number; half second
D.The number; two thirds
漏电保护从保护方式上可分为(漏电保护)、(选择性漏电保护)、(漏电闭锁)。()