Double Bracket, Transport Device Pitch

This phrase seems to describe a concept or idea related to transportation and possibly some kind of container or holding mechanism.

• Double Bracket: This could refer to a structural element with two brackets, perhaps used for support or attachment.
• Transport Device Pitch: This suggests a presentation or proposal for a new type of transportation device. The "pitch" implies a persuasive attempt to gain interest or funding.

Without further context, it's difficult to determine the specific meaning of this phrase. It could be related to various fields such as engineering, design, or even science fiction.