?定心爪

... 吸嘴 nozzle 定心爪 centering jaw 定心台 centering unit ...

?定中爪

... centering ball: 定心钢球 centering jaw: 定中爪 centerline: 中线,中心线 ...

?上定中爪

... 定中爪 centering jaw ; jaw, centering 上定中爪 centering jaw ; centering 定中凸轮 CENTERING CAM ...