Preliminary approach to vegetation rehabilitation techniques of abandoned coalpit of langwogou small watershed 狼窝沟小流域废弃煤窑生态修复技术初探
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Coalpit _ desc ; charcoal was created from wood in a low oxygen burning process . the coal was acceptable but the process was very time consuming and consumed a lot of wood 木炭是由木材在缺氧条件下燃烧制得，很好用，但是烧炭很费时，也会消耗大量木材。
