为了保证既有桥的安全运营和尽可能延长其安全使用年限，应对既有桥进行检测、评估。
In order to making the existing bridge safety operation and extending its safe serving time, the bridge detection and evaluation should be done.
达到报废年限后需继续使用的，必须经机动车安全技术检验机构检验合格。
It must pass the motor vehicle safety inspection to be used after reaching retirement life.
为确保地铁结构不渗不漏，满足运营安全和结构使用年限要求，做好地铁结构永久防水至关重要。
The permanent waterproof measures of Beijing Metro are very important to ensure no seepage and leakage axed to satisfy transportation safety and structure operational life requirements.
应用推荐