Strengthening, maintenance and repair of concrete structure are more and more highly thought of in the trade of civil engineering.
混凝土结构的加固、维护和修补在土木行业中越来越受到重视。
Each road transportation authority shall keep confidential the trade secrets of motor vehicle maintenance and repair operators.
道路运输管理机构应当为机动车维修经营者保守商业秘密。
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