Correct

磙

/ gǔn / 
Strokes

Definition

roller/to level with a roller

Example

As a Noun

roller

1
Shí
石
  
/
tiěgǔn
铁磙

stone/iron roller

As a Verb

roll; level with a roller

2
Bǎ
把
lùmiàn
路面
gǔnpíng
磙平

roll the road surface flat; level the road surface with a roller