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道路改扩建
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道路改扩建
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道路养护
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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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optical multimeter
optical multiplexing
optical multistability
optical navigation sensor
optical network parameter analyzer
optical network unit,ONU
optical non-destructive testing
optical nonlinearities of condensed matter
optical nonlinearities of organic material
optical nutation
optical object
optical observation
optical observation of satellite
optical observation of space objects
optical observatory
optical orthogonal code
optical orthogonal frequency division multiplexing transmission system
optical outburst
optical packet switching,OPS
optical pair
optical parallelism
optical parameter
optical parametric amplification
optical parametric amplification and oscillation
optical parametric amplifier
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