ring-ring-section

base-ring and frame-ring

collector ring (slip-ring)

column-ring beam joint with shear ring bars

outside ring in-feed system ring

ring of n×n matrices over ring R

ring out the old year and ring in the new

ring upon ring

Riser-ring and Ring Module

short-proof ring (arcing ring)

the Western Ring Road Sector of Central Ring Road

anal ring hairs anal ring setae

acid-proof rubber apron

adverse grade apron

air jet spinning apron

Air velocity at apron surface

airport apron

alluvial apron

apron