첨단산업이 · 첨단산업을
high-tech industry, cutting-edge industry
Example
정부는 반도체 같은 첨단산업을 적극 지원하고 있습니다.
The government is actively supporting high-tech industries like semiconductors.
Word parts
첨 pointed+단 tip+산 produce+업 business
Literally 'pointed-tip industry' — at the very tip of progress.
Good to know
첨단 works as a prefix too: 첨단 장비 'state-of-the-art equipment.'