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Special bridge and tunnel protection

Fenley, W.H.

Panama R. R. pontoon, swing, and bascule bridge interlockings, and special tunnel signal circuits. (3000 w.) (No. 61768)

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Special bridge and tunnel protection

Fenley, W.H.

Abstract

Panama R. R. pontoon, swing, and bascule bridge interlockings, and special tunnel signal circuits. (3000 w.) (No. 61768)

Special bridge and tunnel protection

Fenley, W.H.

Abstract

Panama R. R. pontoon, swing, and bascule bridge interlockings, and special tunnel signal circuits. (3000 w.) (No. 61768)

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Document information

Title:

Special bridge and tunnel protection

Additional title:

Sig Engr

Contributors:

Fenley, W.H. (author)

Published in:

Signal Engineer

Publication date:

1915

Remarks:

Ills.

Type of media:

Article (Journal)

Type of material:

Language:

English

Keywords:

Conducting transportation

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