物理模拟虚功原理
virtual work principle for physical simulations
物理模拟余虚功原理
complementary virtual work principle for physical simulations
虚功和虚功率原理
principles of virtual work and power
零差功原理
zero difference work theorem
逆无功原理
inverse reactive criterion
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