Make sure you leave a small border around the outer edge of the liner that does not have any leaves on it, like a small frame.
确保在衬垫外沿没有叶子的地方留下一圈边，像一个框那样。
Continuous concrete wall is used in the air shaft structure, which is built with inversed construction method by using inner liner and transverse frame.
风井采用地下连续墙围护结构，通过内衬及横向框架逆作施工方法实现。
Continuous concrete wall is used in the air shaft structure, which is built with inversed construction method by using inner liner and transverse frame.
风井采用地下连续墙围护结构，通过内衬及横向框架逆作施工方法实现。
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