double helical gear (herring-bone gear)
equivalent spur gear of the bevel gear
equivalent spur gear of the helical gear
gear quadrant steering gear
gear shaping cutter for straight bevel gear
gear slotting cutter for spur gear
Generating gear of a gear
harmonic gear drive with radial gear meshng
harmonic gear drive with transverse gear meshng
planetary gear with conical involute gear
three-shaft Xing-type gear transmission with inner planet gear
(Partial) Homogeneous Cantor set
16S rDNA partial sequence
30° partial dislocation
5-HT4 receptor partial agonist
a partial differential equation
a partial differential system