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刚性系数
el.mach.	rigidity factor
hydroel.st.	modulus of rigidity
met.	stiffness coefficient
space	coefficient of rigidity; coefficient of stiffness; stiffness factor
tech.	factor of rigidity; module of rigidity; rigid factor; stability factor
wind.	rigidity coefficient
刚性系数〔模数，模量〕
construct.	module of rigidity

刚性系数: 4 phrases in 3 subjects

Aviation	1
Electronics	1
Technology	2