ashless paper

常見例句

雙語例句

• In this paper, its history was introduced. The functional elements and their action mechanisms of ashy and ashless additives were analyzed.
  文章簡要介紹了消菸助燃劑的發(fā)展史，對有灰型與無灰型消菸助燃劑的功能單元及作用機理進行分析。
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