main products; primary products; staple products
Refers to the principal goods a company or region produces, often contrasted with by-products or secondary items.
The main products of this factory are automobile parts.
Our company's primary products include both software and hardware.
主力製品 emphasizes 'flagship' or 'core' products that drive a company's business, while 主製品 is a more neutral term for main products.
Compound of 主 (しゅ, 'main') + 製品 (せいひん, 'manufactured goods'). The reading is on'yomi throughout.