保护方法和建议
protective measures and proposals
流域保护方法
watershed protection approach
新方法新技术
new method and technology
New technology and methods
中间体衍生化方法方法
intermediate derivatization method
保护法规
Statutes for preservation
Regulations of heritage conservation
保护方案
concept on protectio
concept on protection
Proposed preventative measure
Protection schemes
protection method
protection scheme
Protection
protection plan
feeder protection
protective solution scheme
变压器保护新原理
New principle of transformer protection
不完全更新保护
incomplete update protection
材料保护保养
material protection and maintain
大机组保护方案
large generator-transformer protection scheme
单基团保护法
monogroup protected synthesis