Correct

气顶

/ qì dǐng / 
Strokes

Example

As a Noun

gas cap

1
Qì
气
dǐng
顶
yóuzàng
油藏

gas-cap reservoir

2
Qì
气
dǐng
顶
qūdòng
驱动

gas-cap drive

3
Qì
气
dǐng
顶
péngzhàng
膨胀

gas-cap expansion