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
carbide taper shank endmill with helical teeth
complex helical drill point
Complicated helical curved surface
conic logarithmic helical line
Conical quadrifilar helical antenna
Conjugate helical surfaces
conoid helical-coil compression spring