D. Cc.
英
美
[医] 双凹的
双语例句
- D. grade of diesel oil and its base oil are also given. Other lubricant, such as gear oil and grease, is also briefly described.
对于润滑剂则重点介绍有关发动机机油的分类和CC、CD级柴油机油及其基础油的性能，机油中使用的添加剂和其它润滑剂如齿轮油、润滑脂等也作了叙述。
美
[医] 双凹的