United Kingdom, Sept. 17 -- Apple CEO Tim Cook has reiterated that the tech giant's large-scale US manufacturing expansion will spark a "domino effect" across American industry.

The company's head unveiled a pledge of $600 billion in investments in the American manufacturing industry over the next four years, aimed at boosting domestic production and strengthening Apple's supply chain.

Speaking with CNBC, Cook said: "We can't be everywhere. I wish we could, but we are putting $600 billion to work in the next four years.

"And so it is an extraordinary commitment. And there's 79 factories across the U.S. that will benefit from this."

The Apple boss added this investment could encourage other companies to build their own factories in the...