category of rings

aquifer basin backing away blepharoplastic donald barthelmes echelon (grating) fillet weld in the flat position jet-deflector medium-level cloud needle-guns pneumono-ultramicroscopic-silicovolcanoconiosis Puemba push-pull error read data group ring crush tester sub-lessee superpolymers thoracoplasty retractor with triple prongs trigona fibrosa cordis valley floor yttrotungstite-(Y)