Inspection car has been developed which graphs hidden rail fissures and marks location on track; based on law that flux surrounding any conductor of uniform area will remain unchanged unless there is defect or lack of homogeneity in conductor.
Electrical apparatus locates hidden rail flaws
Ry. Elec. Engr
Railway Electrical Engineer ; 20 , n 2
1929
1 Fig.
Article (Journal)
English
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