施工图则是施工人员的施工依据，是对工程的说明。
Construction drawings are the basis for the construction personnel, is a description of the project.
神奇的是，他们当时既没有诸如我们今天的建筑计划也没有蓝图，而是依据一套几何学的符号和法则来施工。
Amazingly they worked without architectural plans or drawings as we understand them today. Instead they were guided by a set of codes and principles dictated by the art of geometry.
所得出的结论为此类基坑支护结构设计和施工提供了理论依据和实践参考。
These conclusions provide theoretical basis and practical reference for design and construction of such kind of deep pit.
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