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HOME PAGE OUR PRODUCTS HR CORPORATE CALCULATION GALLERY COMMUNICATION ROCKTOOLS TIJ (ROD) ROCKTOOLS TIJ (ROD) We can supply a range of expansion extension rods in different lengths with various threads shown below produced by CNC machining and advanced heat treatment. HOME PAGE OUR PRODUCTS HR CORPORATE CALCULATION GALLERY COMMUNICATION Copyright 2021 © AY YILDIZ TUNNEL EQUIPMENT & STEEL CONSTRUCTION STRUCTURES All Rights Reserved