Yeomans shall not be liable for any damage caused by abrasive materials , chemicals , scale deposits , corrosion , lightning , improper electrical supply , mishandling , or other similar conditions 对于有下列因素造成的损失：研磨材料，化学物质，水垢沉淀，腐蚀物质，闪电，电源供应故障，违反操作规程的操作，或其它类似情况，美国约曼公司将不承担任何责任。
Black aluminium abrasive material is the national class science and technology development item . it is produced after over 20 years research and the most advance grinding material in the world . it includes black aluminium abrasive , stainless steel pellets , aluminium pellets and steel - thread - cut pellets 黑刚玉磨料是国家级科技发展项目，通过二十多年的钻研，成功地研制了当今世界上最先进的抛光材料黑刚玉磨料及不锈钢丸铝丸钢丝切丸。
Having very high hardness and excellent wear resistance , the abrasive materials diamond and cubic boron nitride have many applications in the processing of hard brittle materials for instance sintered - carbide tooling , patterns , pottery , glass , stone and semiconductors as well as many others . these abrasives are long lasting at extremely high speeds and have a significant cost - saving impact on the processing of ordinary steel materials 金刚石和立方氮化硼cbn磨料因其高硬度和优良的耐磨性能，不仅在硬质合金工具模具陶瓷玻璃石材半导体等硬脆性材料加工中有广泛应用，而且作为半永久性及超高速磨具在一般钢材的加工中发挥着日益突出的作用。
