摘要：分析了青岛地铁3号线所在地域的环境作用，并对地铁二次衬砌混凝土的耐久性进行研究。

Abstract: the environmental effects are analyzed and the secondary lining concrete durability is studied in the design for Qingdao Metro Line 3.

youdao

现在青岛越来越多的人乘地铁上班。

More and more people in Qingdao go to work by subway now.

youdao

青岛市地铁一号线和四号换乘站位于小区基地西侧。

Qingdao City Subway Ride on the 4th line and the base station is located on the west side district.

youdao