surface key bed 地表基准层
pyroclastic key bed 火成碎屑物键层
Event key bed 事件标志层
Key bed method 标志层法
key bed of frozen earth 冻土标志层
key petroleum source bed 标准生油层
key y bed 标准层 ; 标志层
以上来源于: WordNet
At the section with non lithology key bed, the key bed could be selected according to the lithology combination and the particle variation.
在无岩性标志层的层段，则根据岩性组合及粒度变化选择标志层。
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。
I heard the key turn in the front door and I was out of bed like a shot.
我听见钥匙开前门的声音，立刻从床上起来了。
应用推荐