经过多年的营运，目前我国已有至少超过2000多公里的高速公路进入大修期，连霍高速公路即属此类公路。

After years of operating, at present China has at least more than 2000 kilometers of the highway into the overhaul period, even the Huo highway road is such a case.

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随着我国公路建设的发展，公路养护维修的多种任务也伴随而来，尤其是我国修建的一些高等级公路已进入中修或大修期。

With the development of highway construction, road maintenance is also accompanied by a variety of tasks, in particular, some highways have entered a period of repair or overhaul.

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图片：在发现号的轨道飞行器重大修改2003年8月期间，技术人员测试一个控制台上新安装的“玻璃驾驶舱”或的MED显示器。

Image: During Discovery's Orbiter Major Modifications period in Aug. of 2003, a technician tests a monitor on the console of the newly installed "glass cockpit" or MEDS. Photo credit: NASA/KSC

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