锥形环 tapered collar ; conical ring ; conical collar

图形环境 drawing environment ; Graphics Context ; graphics environment ; graphical environments

螯形环 chelate ring

十字形环 [遗] cruciform loop

方形环 Square Loop ; Q-RING

楔形环 cambridge ring ; Wedge type ring ; Wedge ring ; wedge pin

心形环 thimble

锥形环钻 conical trephine

线形环路 wire loops