Construction technique standard of site assembling and welding for steel tower and vessel in petrochemical industry 石油化工钢制塔容器现场组焊施工工艺标准
2.
Small wastewater treatment systems for up to 50 pt - packaged and or site assembled domestic - wastewater treatment plants 最大50 pt的小型废水处理系统.打包好的和或现场组装的家用废水处理设备
3.
Small wastewater treatment systems up to 50 pt - part 3 : packaged and or site assembled domestic wastewater treatment plants 50pt及以下小型污水处理系统.第3部分:整装的和或现场装配的生活污水处理设备
4.
Small wastewater treatment systems for up to 50 pt - part 3 : packaged and or site assembled domestic wastewater treatment plants ; german version en 12566 - 3 : 2005 高达50pt的小型废水处理系统.第3部分:整装的和或现