板材四面折边单元
sheet metal four edge folding cell
四边形薄板单元
quadrilateral thin plate bending element
四边形薄板弯曲单元
quadrilateral thin plate bending element
四结点板单元
4-nodes plate bending element
筛板单板阻力
tray pressure drop of sieve plate
山西省一四四煤田地质勘探公司
No.144 Exploration Team
shanxi coal-field geology exploration company
四单极质谱计
quadruple monopole mass spectrometer