三维排列 three-dimensional arrangement ; three-dimensional l arrangement

肋叉排列三维内肋管 d internally crossing-finned tube

排成三列的 triserial

三角排列 cam-setting ; trefoil formation

三排横列舱口 three row hatch

三角排列图 cam chart

针盘三角排列 dial cam arrangement

三排列方法 triplets permutation method