blocks of the first order
hexagonal prism of the first order
hexagonal pyramid of the first order
hexagonal unit prism of the first order
rhombohedron of the first order
tetragonal base of the first order
tetragonal pyramid of the first order
the first order differential
the first order hydropower plant of Lianlu
The first order hyperpolarizabilities
the first order optimization method
Thermokinetics of the first order reaction
trigonal prism of the first order
trigonal pyramid of the first order
unit prism of the first order
The first order derivative spectorphotometry
first transition series
second order transition
second order transition temperature