Bell'sbelln.钟；铃；门铃；钟声；钟状物vt.敲钟；使象钟状地张开vi.使呈钟状；张开Belling's hypothesisbell-type annealing罩式退火bell type chest piece钟型胸件Bell's Scotch Whiskeybell and spigot frame承插结构bell-type generator钟形乙炔发生器,浮筒式乙炔发生器bell less type system无钟装料机bell and flange piece承口法兰短管bell-out bored pile扩底钻孔灌注桩Belling saccharimeter贝林糖量计