seamless shell ring 无缝锅炉筒

seamless shell crown [口腔] 无缝壳冠

swager for seamless shell [口腔] 无缝冠压模机

seamless shell course 无缝锅炉筒

tapering form seamless shell 尖形无缝冠

square form seamless shell 方形无缝冠

round form seamless shell 圆形无缝冠

incisor form seamless shell 释义切牙形无缝冠

elliptical form seamless shell 椭圆形无缝冠