Grab Maintenance: factors affecting the material wear external factors and internal factors. External factors include the load, sliding speed, hardness of the abrasive and geometry and other factors. Internal factors include the chemical composition of the material, carbide type, microstructure and so on. In order to improve the life of the grab to grab all wear parts for different situations grab mine plant, the choice of different grabs mine resistant materials, and complemented by a different process mining grab manufacturers, thereby Grab greatly improved life. Grab the extract device under the crane for handling a variety of goods. Also can be defined as: Grab an effective tool in handling a variety of goods under the crane with. Grab the birth and development of greatly improved production efficiency. Grab the birth and invention also improves production security, greatly reducing the personal injury accident. Mine grab model, Xingda mine (certified), mining grab provided by the Anyang County Xingda Mining Machinery Co., Ltd. Anyang County Xingda Mining Machinery Co., Ltd. (www.ayxxdkj.com) is Anyang, other leaders, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Xingda mine in leadership with the staff warmly welcome all inquiries negotiations to create a better future Xingda mine.