the new practical guide to electronic communication and distance with a dictionary business

摘要

this is an umbrella and umbrella, innovative, strong and able to fill the gaps and shortcomings of the existing umbrella mechanism based on double or multiple layers superimposed on and use, as well as the retractable, winter than in summer.the system provides multiple layers of second opening umbrella which nearly doubled its size and provides a larger area of coverage for a maximum of protection against the rain, even in the most turbulent days.the system of "double anti pressure strength is also brocheu00bb umbrella, robustness, stability and control in the presence of wind pressure.