法兰与螺栓配套表

法兰与螺栓配套表对焊法兰（螺栓数量）螺栓规格光滑面平焊法兰（螺栓数量）螺栓规格外径PN1.6PN2.5PN4.0PN1.6PN2.5DN20(4)(4)(4)(4)(4)M12×60M12×60M12