It is also lighter than comparable steel or concrete structures, reducing the depth and extent of excavation and foundations.

同可比较的钢材或者混凝土结构，它更加的轻巧，减少了基础开挖的的深度和广度。

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The key problem of the excavation of the main carven system is to determine the best excavation sequence and excavation options according to the concrete features of the project.

如何结合工程具体特点，确定最优的爆破开挖程序和开挖方法，这是主厂房系统爆破开挖的关键所在。

youdao

Typical units are cubic yards for excavation or concrete work and tons for structural steel.

典型的单位是挖方或混凝土工程的立方码和布局钢的吨位。

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Twenty years on, he spent much of what remained of his late wife Margaret's fortune the main source of financing for the excavation on reconstructing bits of the palace in reinforced concrete, then a fashionable new building material.

ECONOMIST: Bullshot