| 11. | They cut, welded, soldered, and coated metal samples.
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| 12. | Panelling was welded into continuous sheets and riveted to the frame.
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| 13. | The design assumed a welded hull rather than the usual rivetting.
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| 14. | The " W " in both models stands for welded frame.
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| 15. | Welded to the steel columns and beams are lighter steel frames.
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| 16. | welded hollow plastic plate air-to-air heat exchangers.
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| 17. | Pressed-panels are welded together to create complete body shells.
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| 18. | The fuselage and tail surfaces are constructed of welded metal tubing.
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| 19. | That same year Continental introduced the first commercially practical welded can.
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| 20. | It was covered by a welded steel lid attached to concrete.
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