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recently, good news came from china national intellectual property administration.two scientific and technological achievements by aceg general contracting company,i.e."control system and method for dustproof spraying ring of drilling bit and dustproof drilling bit" and "a hanging-typedust removal system and method",were awarded patent certificates of national invention. innovation leads development and science and technology drive the future.aceg will continue to efficiently coordinate and promote scientific and technological innovation and development.with key projectsas the carrier, it will accelerate the transformation of scientific and technological innovation achievements, contributing to aceg's high-quality development. 
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