I Bet Lots of People Don’t Know What the Triangle Pattern on The Aluminum Collapsible Tube Is Used For.
The raw aluminum is well characterized by its ductility, airtightness and safety, and it’s commonly used in the manufacture of packaging such as medicine, ointment, cream, glue and adhesive etc.. and is closely related to people’s daily life. People with normal eyesight can identify the feature, safety and usage of the product visually from the instruction and images on the packaging etc.. But people with visual disability will necessarily request some physical signs or patterns to perceive and identify the [...]