1.  superhard
2.  ultrahard

• 1. 超硬: PCD&PCBN | extra-hard | superhard
• 2. 超硬材料: super abrasive | ultrahard material
• 3. 超硬合金钢: hard alloy steel

更多释义

• 1.超硬脆材料的难加工性制约了其推广应用。
  Hard machinability of hard-brittle material is crucial for its application.
  dict.yoduao.com
• 2.硬度是衡量超硬材料烧结体的主要特性之一。
  Hardness is one of the main characters of ultrahard material sinters.
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• 3.介绍了特种加工技术在修整金属结合剂超硬磨料砂轮中的应用。
  The application of nontraditional machining technology in the dressing of metal bonded superabrasive grinding wheel is introduced.
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