After all, there came an experimental study on modification of wall filled with stone ballast block.
经过近两年的研究，石渣砌块改性初见成效。
The design concept, weight calculation and the method of installation of the ballast block are described and introduced.
本文介绍了压块基本概念、压块设计和压装等几个问题。
The design concept, weight calculation and the method of installation of the ballast block are described and introduced.
本文介绍了压块基本概念、压块设计和压装等几个问题。
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