测量直角偏差 90 139 9018011128 RULER ANGLE 80 20230240250260270280290300 DIGITAL 70 60 837nu 50 内角 (阴角)检测 2 DIGITAL ANGLE RULER er ecr oet0Ir00r06z0820u20920920p20cz022 星 IV 外角（阳角）检测
