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centre of inertia
 centre of inertia
el. 惯量 冲心
| system
 system
gen.
IMF. 安排
met. ; 装置
tech. 制度; 体系; 系统; 方法

to phrases
centre of inertia
el. 惯量冲心
hydroel.st. 惯性中心
centre of inertia system
: 3 phrases in 2 subjects
Bridge construction1
Technology2