The picture was then switched to the Nigeria and West Africa training center. A female trainer introduced herself in fluent mandarin.
2
以尼日利亚拉格斯防波堤修复工程石料开采为例,介绍石料开采爆破设计、施工工艺。
Take the quarrying of the Lagos harbor moles repairing project in Nigeria as example, this paper introduces the blasting design and construction technology.