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【正文】 n replace with a click of puter mouse hours of laborious work done on thousands of drawing boards. So new products, no matter how plicated, can be developed much faster. For the first time, Boeing will not have to build a giant replica of its new airliner, the 777, to make sure all the bits fit together. Its CAD system will take care of that. Why did Boeing not need a replica of the 777
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