distance between centres of lines；distance between centers of tracks；midway between tracks
distance offset distance
90 tiling off-axis parabolic mirrors
backward parabolic equation
backward parabolic problem
boundary value problem of partial differential equation of parabolic type
Busemann parabolic formula
complete parabolic model
complete-nonlinear parabolic equation
compound parabolic concentrator
复合抛物面聚光器
复合抛物面集热器
复合抛物面型集热器(CPC)
复合式抛物面聚焦器
抛物面聚光器
compound parabolic concentrator with flat absorber
coordinates of the parabolic cylinder
coupled parabolic equation dispersion problem
cutting parabolic curve equation
cylindrical gears with parabolic tooth traces
cylindrical parabolic reflector
Degenerate and singular parabolic equations