Jia Yan displays a hole drilled by the tool he invented and a hole drilled by an ordinary tool. The tool in his left hand is invented especially for drilling materials such as sponges and foams. [Photo by Dong Ning/China.or.cn]
Jia Yan, 52, is the chief technician of China Aerospace Science and Industry Corporation whose job is to produce and install a critical part of missiles commonly called the "eyes."
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