Transport Research International Documentation (TRID) https://trid.trb.org/ en-us Copyright © 2026. National Academy of Sciences. All rights reserved. http://blogs.law.harvard.edu/tech/rss tris-trb@nas.edu (Bill McLeod) tris-trb@nas.edu (Bill McLeod) Transport Research International Documentation (TRID) https://trid.trb.org/Images/PageHeader-wTitle.jpg https://trid.trb.org/ THE PRINCIPLE OF CONTACTLESS ULTRASONIC FLAW DETECTION OF RAILS https://trid.trb.org/View/36706 Thu, 01 Dec 1977 00:00:00 GMT https://trid.trb.org/View/36706 TEST BENCH FOR CONTACTLESS ULTRANSONIC QUALITY CONTROL OF RAILS https://trid.trb.org/View/36707 Thu, 01 Dec 1977 00:00:00 GMT https://trid.trb.org/View/36707 ELIMINATION OF EMBANKMENT SEDIMENTS https://trid.trb.org/View/36690 Wed, 23 Nov 1977 00:00:00 GMT https://trid.trb.org/View/36690 ANTI-HEAVING CUSHIONS OF GRANULATED SLAG https://trid.trb.org/View/36694 Wed, 23 Nov 1977 00:00:00 GMT https://trid.trb.org/View/36694 CALCULATION OF THE THICKNESS OF A HEAT-INSULATION PROTECTION FROM FOAM PLASTIC https://trid.trb.org/View/36697 Wed, 23 Nov 1977 00:00:00 GMT https://trid.trb.org/View/36697 ELIMINATION OF HEAVING WITH FOAM PLASTIC PROTECTION https://trid.trb.org/View/36698 Wed, 23 Nov 1977 00:00:00 GMT https://trid.trb.org/View/36698 PROTECTION OF TRACK AGAINST AVALANCHES https://trid.trb.org/View/53472 Tue, 20 Sep 1977 00:00:00 GMT https://trid.trb.org/View/53472 TECHNICAL METHODS OF TRACK MAINTENANCE https://trid.trb.org/View/65992 Wed, 22 Dec 1976 00:00:00 GMT https://trid.trb.org/View/65992