{ "item_title" : "Block And Interlocking Signals", "item_author" : [" W. H. Elliott "], "item_description" : "Block And Interlocking Signals: What They Are For; What They Do; How They Do It is a comprehensive guide to the functioning and purpose of block and interlocking signals in the field of railway transportation. Written by W. H. Elliott, a renowned expert in the field, the book provides a detailed explanation of the various types of signals used in railway systems, their significance, and their operation. The book covers the basics of signaling, including the different types of signals, their placement, and their meanings. It also delves into the advanced concepts of interlocking signals, which are used to control the movement of trains through complex junctions and crossings. The book is an essential resource for anyone involved in the design, construction, or operation of railway systems, as well as for students and enthusiasts of railway technology. With its clear and concise explanations, detailed diagrams, and practical examples, Block And Interlocking Signals: What They Are For; What They Do; How They Do It is an indispensable reference for anyone interested in the fascinating world of railway signaling.This scarce antiquarian book is a facsimile reprint of the old original and may contain some imperfections such as library marks and notations. Because we believe this work is culturally important, we have made it available as part of our commitment for protecting, preserving, and promoting the world's literature in affordable, high quality, modern editions, that are true to their original work.", "item_img_path" : "https://covers4.booksamillion.com/covers/bam/1/16/385/076/1163850764_b.jpg", "price_data" : { "retail_price" : "45.95", "online_price" : "45.95", "our_price" : "45.95", "club_price" : "45.95", "savings_pct" : "0", "savings_amt" : "0.00", "club_savings_pct" : "0", "club_savings_amt" : "0.00", "discount_pct" : "10", "store_price" : "" } }

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