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Continue to ChatApple’s patent-pending 18k gold: Harder, more scratch-resistant, and 'less gold' https://macdailynews.com/2015/03/07/apples-patent-pending-18k-gold-harder-more-scratch-resistant-and-less-gold/
Apple’s patent-pending 18k gold: Harder, more scratch-resistant, and 'less gold' https://macdailynews.com/2015/03/07/apples-patent-pending-18k-gold-harder-more-scratch-resistant-and-less-gold/