Deep groove and narrow slit parts
Deep groove ball bearing
full-element deep groove ball bearing
medium size deep groove ball bearing
Seal Deep Groove Ball Bearings
Sealed Deep Groove Ball Bearings
circular groove waveguide
Circular groove waveguide cavity
Corrugated circular groove waveguide
Dielectric loaded circular groove waveguide
Deep and Ultra-deep Water
DEEP AND ULTRA-DEEP WELL
earlier deep plough and deep fertilization