Material：The zinc metal alloy die-casting By the line trough , the case assign to , qualify for the next round of competitions , divide , qualify for the next round of competitions the box in this system, multi-functional socket and enclosure make up . This system is reasonable in design, it is superior to select suitable materials, making is meticulous . And can use the scientific one , economic, different The flexible unit individually of the pattern of the specification makes up the multiple functional flexible system This system is with its original disguise, flexibility, install dependability and gain and design non-maintainingly vastly , The favors of the unit in charge of construction and square main fact of family property.