matrix-matrix multiplication
Positioning Screw， Set Screw
right hand screw [= right handed screw]
screw hexagon socket head cap screw
fundamental matrix and essential matrix
inverse matrix of modal n matrix
matrix enhancement and matrix pencil
matrix enhancement and matrix pencil MEMP
Matrix generalized quaternion matrix
Power matrix of adjacent matrix
Rees matrix semigroup of matrix type
Rees matrix semi-group of matrix type
Table-module Matrix(T-M Matrix)
transmission matrix (=T-matrix)
a screw rod for transporting bottle