... 岩溶（喀斯特）地貌 karst landform 标志层法 Key bed method 晚古生代聚煤盆地 Late Paleozoic coal-accumulation basin ...
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Later in the paper, a correlation between the main coal-seams in this province is made, in combination with the traditional method of the key bed, coal petrography and palaeontology.
然后，结合传统的标志层法、煤岩学及古生物学方法，对该区主要煤层进行对比。
The design method of a dust removal device for a magnetically stabilized fluidized bed is presented with a focus on the description of key component design.
介绍了一种磁稳流化床除尘装置的设计方法，特别就装置关键部件的设计重点做了说明；
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