helical chip filter

ChIP-chip experiment

double helical ribbon helical screw impeller

chip M68HC11A8 chip

ICL7135 chip and AD7541 chip

16 multislice helical CT

16-detector row helical CT

16-slice helical CT scanner

64 multi-detector helical CT

64-slice helical CT

64-sliees helical CT

asymmetric variable pitch helical spring

axial helical structure

Backfire helical antenna

Ball helical transmission

barrel-shaped helical spring

bushing helical seal

carbide helical end mill

carbide taper shank endmill with helical teeth