Correct

核保护伞

/ hé bǎohùsǎn / 
Strokes

Example

As a Noun

nuclear umbrella (over a country or an area)

1
Duì
对
xīōu
西欧
de
的
hé
核
bǎohùsǎn
保护伞

the nuclear umbrella over Western Europe

2
Tígōng
提供
hé
核
bǎohùsǎn
保护伞

offer/provide a nuclear umbrella