从解决屋面渗漏综合治理的关键入手，提出了较切合国情的延长防水屋面使用年限的措施。
Starting with the Crux of comprehensive harnessing to troubleshoot roof leakage, measures to prolong waterproof roof lifespan which suit the national conditions were put forward.
通过对离心球墨铸铁管性能的阐述，并与灰铸管、钢管的性能、安装方法、使用年限、综合效益相比，认为离心球墨铸铁管是理想的输卤管材。
Author considers that the centrifugal ball graphite cast iron pipe is a perfect material for brine transportation through comparing the performance of centrifugal ball graphite cast iron pipe.
土壤质量综合指数随植被恢复年限的增加而增加；
Soil quality index increased with vegetation restoration during over 140 years.
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