菲涅耳-惠更斯原理
Fresnel-Huygens principle
广义惠更斯原理
Huyghens principle in wider sense
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
heat treatment
principles of heating processing
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