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2. High-speed door - Wikipedia

   en.wikipedia.org/wiki/High-speed_door

   They are technical enhancements of the generally known sectional doors, PVC fabric doors or roller shutters. The main difference is that the durable construction provides a higher operating speed and they are able to sustain a higher number of cycles (opening and closing cycles) and require lower maintenance and repair cost.

3. Roller shutter - Wikipedia

   en.wikipedia.org/wiki/Roller_shutter

   A roller shutter, security shutter, coiling door, roller door or sectional overhead door is a specialized type of door or window shutter consisting of multiple horizontal slats, bars, or web systems interconnected through hinges. The mechanism involves lifting the door to open it and lowering it to close.

4. Garage door - Wikipedia

   en.wikipedia.org/wiki/Garage_door

   A typical single-car garage roller door has a preloaded spring inside the rolling mechanism. The spring reduces the effort required to open the door. Oversized roller doors in commercial premises are not sprung (except in the US), and a manual pulley and chain system or a geared motor is used to raise and lower (roll up and roll down) the door.

5. Door - Wikipedia

   en.wikipedia.org/wiki/Door

   A roller shutter or sectional overhead door is one variant of this type. A tambour door or roller door is an up-and-over door made of narrow horizontal slats that rolls up and down by sliding along vertical tracks; it is typically found in entertainment centres and cabinets.

6. AOL Mail

   mail.aol.com

   Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

7. British Rail Class 307 - Wikipedia

   en.wikipedia.org/wiki/British_Rail_Class_307

   In the early 1990s, the Class 307 passenger units were being withdrawn from service. At the same time, the Parcels sector of British Rail , later known as Rail Express Systems , were looking for a fleet of parcels multiple units, which would be more cost effective to run than locomotive-hauled stock used at the time.