Hollow drill steel _ _ hollow steel hollow steel manufacturers (View) provided by Liaocheng Zeyu Metal Products Limited. Liaocheng Zeyu Metal Products Co., Ltd. (www.zk55simnmo.com) is specialized in the 'hexagonal hollow steel, hexagonal lance, hexagonal drill rod, alloy drill pipe, drill rod mine "of the enterprise, the company of" honesty, hard service "concept, to provide you with the highest quality products and services. Welcome to inquire! Contact: Mr. Sun. Liaocheng Zeyu Metal Products Co., Ltd., focusing on the timeliness of supply and demand, stick with the fastest speed to produce the best products in the shortest possible period for customer satisfaction in our products and services. Liaocheng Zeyu Metal Products Co., Ltd. is a professional manufacturer of mining drill rods, hexagonal hollow steel, circular hollow steel integrated enterprise blowing hollow steel, specifications: H19 hexagonal hollow steel, H22 steel hexagonal hollow hexagonal hollow steel, H25 hex Hollow steel, D32 circular hollow steel, D38 circular hollow steel, D45 circular hollow steel, D51 circular hollow steel. Liaocheng Zeyu Metal Products Co., Ltd. is a drill rod production, research and sales as one of professional manufacturers. Our products are independent design and development ability, can provide the perfect solution for monolithic construction customers worldwide. The main products are 60si2mn, 55simnmo hollow steel, 35simnmoV, 40simncrnimo hexagonal hollow drill rod products. In the open air and underground mining, water, oil and gas, bridges, buildings and other geotechnical construction line interface of the column-class manufacturer of drill rod. Talk philosophy, reputation and value creation, adhere to the "people-oriented", follow the "advance man" code of conduct.