三角线元
triangular linear finite element
时空线元
line element of space-time
四面体线元
tetrahedral linear finite element
线元天线阵列
linear element antenna array
三角形线元与二次元
linear and quadratic triangular elements
在线元素分析
on-line element analysis
on-line elemental analysis
在线元素形态分析
On-line elemental speciation analysis