10.9级薄螺母GB6172细丝牙扁螺帽M8M10M12M14M16M18M20M24M30-M64

10.9级薄螺母GB6172细丝牙扁螺帽M8M10M12M14M16M18M20M24M30-M64

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百钢五金
河北 邯郸