carbide taper shank endmill with helical teeth
gear with helical teeth
Helical gear with double circular arc teeth
double helical ribbon helical screw impeller
16 multislice helical CT
16-detector row helical CT
16-slice helical CT scanner
64 multi-detector helical CT
asymmetric variable pitch helical spring
axial helical structure
Backfire helical antenna
Ball helical transmission
barrel-shaped helical spring
carbide helical end mill
complex helical drill point