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顶管靠背墙
顶管作业坑内、承受顶管设备反作用力的墙体。
来源:《油气输送管道穿越工程施工规范 GB50424-2015》
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Archiver|手机版|小黑屋|牛马Next ( 苏ICP备17047105号-6 )Published by Stonespider

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