*free combine advertising truss *anticorrosion aluminium display *aluminium frame system or backdrop set *use promotion event

strong promotion aluminium frame system 

*free combine advertising truss*anticorrosion aluminium display*indoor expo frame or backdrop set*use promotion activitiy 

usage*use as the backdrop set of big advertising poster *product promotion activities*activity advertising sites*live broadcasting*conference events*concert background*expo display equipement system*supporting frame

strong promotion aluminium frame system