The main conclusions of the action of regular standing waves on sand beds in front of a vertical wall are also mentioned briefly for comparison.
为了便于比较，文中也简要地提及了规则立波对直立墙前沙底作用的主要结论。
The paper discusses the coal petrography and proximate analysis of the vertical systematical samples of the Honso and Joso coal beds in the Miike coal field.
本文对日本三池煤田有明矿本层煤和上层煤的系统分层样品进行了媒岩鉴定和工业分析。
These cases occur most often in horizontal Wells, or vertical Wells with the combined effects of invasion and large resistivity contrast between beds.
这种情况常出现在水平井或者有侵入影响并且层间电阻率对比度高的直井中。
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