【医】 riveted matrix
bore with a reamer; ream
hammer; nail; peg; pin; sew on
【医】 helo-; nail; peg; Pin
base; basic; foundation; key; primary; radix
【化】 group; radical
【医】 base; basement; group; radical
flake; parcel; partial; patch; piece; slice
【计】 slice
【医】 disc; disci; discus; disk; flap; piece
【经】 card