21. The myriad staircases were made from planks connected only by the skimpiest metal tubing . 22. A metal tube rocker was shown at the 1851 Crystal Palace Exhibition in London. 23. The aircraft carriage is built from metal tubing with a composite partial cockpit fairing. 24. 1915 _ Maurice Levy designs the first American lipstick in a sliding metal tube . 25. In ` Air Force One,'we have everyone stranded in a metal tube in midair. 26. The aircraft carriage is built from metal tubing with an optional full cockpit fairing. 27. The aircraft is made from metal tubing , with its wing covered in Dacron sailcloth. 28. Hydroforming uses liquid under extreme pressures to form metal tubes . 29. Signs identifying the luggage carousels are enlarged children's blocks, simply hung from metal tubes . 30. Two metal tubes are attached to the ports on the inside of the keg.
