1. having the characteristics of pitch or tar. 
   具有沥青或者树脂的特性。
2. history of shale oil industry 
   页岩油工业发展史
3. The new process extracts oil from shale. 
   这一新方法用于从页岩油里提炼出石油。
4. Any of various dark gray sandstones that contain shale. 
   杂砂岩任何含有页岩的多种黑灰色砂岩之一
5. shale from which oil can be obtained by heating. 
   加热后能分解出油的页岩。

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• 1. 页岩沥青
  摇动筛倾角 shale tar pitch...页岩沥青 short pitch...短节距 short pitch factor
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