Taigu Chang in foundry share with you Why are manhole covers round. The maximum material utilization and conservation. If the wellhead made significantly smaller than the square and ductile covers price covers Shanxi, rolling covers would not fall into the well. Here involves a material saving issues. Covers are used depending on the size of the wellhead, If you have to press a surface area above the wellhead is much larger than a square manhole cover, then use the material and practical nature does not directly use the circular covers more efficient, which saves material covers ductile Shanxi covers casting, but also to ensure the safety of the wellhead. Taigu Chang in foundry can do: 1, in order to prevent the contact surface Manhole covers and uneven, causing the car with impulse response, flexible cushion between the wells and wells box installation, fire impact sound. Or covers the well block the contact surface by mechanical processing facilities (only round products) Shanxi ductile covers manufacturing, with the smooth. 2, in order to prevent the covers installed outdoors was stolen, can be equipped with locks on covers, said locking means simultaneously, to form a complete anti-theft device. Shanxi ductile covers manufacturers, Chang-year foundry (certified), Shanxi Taigu ductile covers provided by Chang in foundry. Taigu Chang in foundry (www.sxcnzz.com) is Jinzhong, machining leaders, over the years, the company implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. In Chang in foundry leadership with the staff warmly welcome all inquiries negotiations to create Chang foundry in a better future.