기간산업이 · 기간산업을
key industry, backbone industry
Example
철강과 전력은 국가의 대표적인 기간산업입니다.
Steel and power are a nation's typical key industries.
Word parts
기 base+간 trunk+산 produce+업 business
Literally 'base-and-trunk industry' — the trunk the rest of the economy grows from.
Good to know
Don't confuse with 기간 期間 'period of time' — same sound, different hanja.
Related words