Correct

钢印

/ gāng yìn /
Strokes

Example

As a Noun

steel/embossing seal

1
Zài
zhèngshū
证书
shàng
jiāgài
加盖
gāngyìn
钢印

stamp a certificate with the steel seal

2
Gěi
xíngchē
自行车
gāngyìn
钢印

stamp the cycle registration number on a bicycle

3
Gài
gāng
yìn

affix/impress/set a steel seal (to)

As a Noun

embossed seal/stamp