空心村改造
hollow village reconstruction
提铁降硅技术改造
Iron improvement and silicon reduction technical transformation
以大代小改造
retrofit scheme upon substitution of large for small
1000t吨甲板驳改造
transformation of 1000 tons deck barge
AB工艺的改造
reconstruct of AB process
FDFCC改造
technical upgrade with FDFCC technology
HACH磷表的改造
Alteration of HACH phosphate analyzer
IEGT桥臂改造
IEGT bridge arm modification
PE装置改造
PE installtation improvement
PLC控制网改造
PLC control net reconstruction