面积比原理
the principle of the area rate
Area-ratio Principle
第一性原理理论
first principles calculations
科学管理原理
principle of scientific management
热处理原理
heat treatment principles
principles of heating processing
heat treatment
热处理原理及工艺
principles & technology for heating processing
热处理原理与工艺
heat treatment principl and process
人力资源管理原理
principle of human resource administration
生物处理原理
biological treatment principle
原理理论分析
principle theory analysis