roadstone

常見例句

• The paper states the development and application of raw material as cement, fertilizer and the roadstone and the recovery of useful componants are also discussed.
  竝對它們作爲(wèi)水泥、肥料生産和築路工程中的原材料及有用組分廻收等方麪的開發(fā)利用進(jìn)行了探討。
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