4. Railway switches and signals
  5. Block-signal systems
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Wallgard Gunnar A.

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Western Industries (Proprietary) Limited

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Westinghouse Airbrake Company

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Westinghouse Brake and Signal Holdings Ltd.

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Wilcox Clinton S.

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Wilkas Joseph R.

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Williamson, Jr. A. G.

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Wilson H. James

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Wilson Jack I.

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Woods David H.

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