Which one is the correct order for the following events?(1) ‘Air On’ signal sent; (2) low pressure signal received by Master Relay; (3)steam pressure check and it is less than required; (4) water level check and it is normal.
A、 (1) (4) (3) (2)
B、 (3) (2) (1) (4)
C、 (4) (3) (2) (1)
D、 (2) (4) (3) (1)
发布时间：2025-05-10 11:18:56
