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道路改扩建
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道路改扩建
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road reconstruction and expansion
道路改扩建
当原有道路设施的服务能力或水平无法满足使用需求时,利用原有道路资源,通过拓宽、改造等方式,实现道路等级或规模的提升,以提高道路服务水平、通行能力及安全性的工程建设行为。
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venous valvotransplantation
vent
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ventilating pit
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ventilation
ventilation and air-conditioning design of protective engineering
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ventilation door
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ventilation for deep open pit
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ventilation methods
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ventilation networks solving
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