An alloy body, the advanced support, dexterous artistic, the strut are
steady;

2. The steel models the lock catch, opens locks easily, gentle
reliable, 鬆緊 to be then moderate;

3. The screen may correct the angle, rectifies the trapezoidal
picture, the command speaks in public specialized;

4. Moves conveniently, 開合 freely, the operation simple, safe is
reliable;

5. Is suitable to the narrow and small fluid space, like showing hall,
demonstration room.