Gōngchéngshī men huā le sān nián shíjiān yánzhì zhè kuǎn xīn chǎnpǐn.
The engineers spent three years developing this new product.
Tips
usage
研制 implies both researching and creating a product. It's more formal than 开发 (kāifā, to develop) and is often used for medicines, technology, and weapons.
