In this Aug. 21, 2019, photo, a Huawei research engineer holds up a coated screw designed to reduce signal interference at the Huawei Materials lab in Dongguan in Southern China's Guangdong province. Facing a ban on access to U.S. technology, Chinese telecom equipment maker Huawei is showing it increasingly can do without American components and compete with Western industry leaders in pioneering research. (AP Photo/Ng Han Guan)
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