三分力天平 three component blance

水翼三分力仪 component balance for hydrofoil

用四分之三的力量挥杆 Three quarter swing ; three quarter

分三块巧克力 Sharing the Three Chocolate Bars

三维应力分布 three-dimensional stress distribution ; d stress distribution

船载三分量磁力仪 Shipboard Three Component Magnetmeter

三维受力分析 three-dimensional force analysis

三维动力分析 D dynamic analysis