Correct

排灌

/ pái guàn / 
Strokes

Example

As a Verb

drain and irrigate

1
Jīxiè
机械
páiguàn
排灌

irrigation and drainage by machinery

2
Páiguàn
排灌
shèbèi
设备

irrigation and drainage equipment

3
Pái
排
guàn
灌
chuán
船

irrigating vessel