| 41. | The first gunpowder weapons usually consisted of metal tubes tied down to wooden staves.
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| 42. | "In ` Das Boot,'we had the crew stranded in a metal tube under the sea.
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| 43. | The metal tube shields the conductors from electromagnetic interference.
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| 44. | It had a duralumin sheet hull and the tail was made of framed metal tubing.
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| 45. | The aircraft carriage is built from bolted metal tubing.
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| 46. | Beyond it, two arms hold the metal tube in place as the 72 chains unfurl.
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| 47. | First the bushing, a tapered metal tube, is inserted in the end of the hose.
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| 48. | The receiver proper is a square metal tube which partly nestles inside the plastic handgrip.
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| 49. | The fuselage is made of metal tubing covered with fabric, and the wing is plywood.
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| 50. | The empty metal tubes would subsequently be collected in a pan located under the weapon.
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