EDM trigonometric leveling
Infrared trigonometric leveling
inverse trigonometric function
inversion formula of trigonometric sums
method of trigonometric inter- polation
method of trigonometric interpolation
mixed trigonometric polynomial systems
ordinary trigonometric leveling
orthogonal trigonometric function basis
river-crossing trigonometric leveling
table of trigonometric function
the ETS trigonometric leveling
the ordinary trigonometric leveling
trigonometric control point
trigonometric fixed point