Correct

咕隆

/ gū lóng /
Strokes

Example

As an Onomatope

roll; boom; rattle; rumble

1
Huòchē
货车
zài
zhèn
镇子
lóng
咕隆
lóng
咕隆
shǐguò
驶过
  

Freight wagons rumbled through the town.

Related

黑咕隆咚