铁路车辆 沉头侧切口机械螺钉
Railway rolling stock Grade A Countersunk notched head machine
铁路车辆 半沉头侧切口机械螺钉
Railway rolling stock Grade A raised countersunk notched head machine
铁路车辆 圆柱头侧切口机械螺钉
Railway rolling stock Grade A Notched cheese head machine screws
铁路车辆 扁圆头侧切口机械螺钉
Railway rolling stock Grade A notched dome head machine screws
铁路车辆 A级 沉头侧切口螺钉/螺母
Railway rolling stock Grade A notched raised countersunk head screws/nuts
铁路车辆 A级 圆头侧切口螺母
Railway rolling stock - Grade A - Round head nuts