1 Subjects: “...Storage ring...”

2 Subjects: “...magnetic isolation ring...”

3 Subjects: “...impulsively generated viscous vortex ring...”

4 Subjects: “...coffee-ring...”

5 Subjects: “...polyadic ring...”

6 Subjects: “...semiconductor quantum ring...”

7 Subjects: “...ring oscillator (RO)...”

8 Subjects: “...photon rings...”

9 Subjects: “...ring narrow groove...”

10 Subjects: “...Raschig rings...”