化工工人
Chemical plant workers
trace element
Employees of chemical factory
Chemical industry workers
仅供施工人员使用。
This is just for construction personnel
人工工作量模型
artificial work-load model
人工人口系统
artificial population systems
外来施工人员
External construction member
泵吸反循环施工工艺
pumped reverse circulation workmanship
变掺量施工工艺
Construction Technique of Cement Addition Variation
长管棚施工工艺
long steel pipe construction technology
大型钢模壳施工工艺
Engineering techniques of large-scale steel fomwork
吊装施工工艺
hoisting construction craft