top thickness

The elastic wave reflection method is one of the effective methods of detecting the thickness of the top coal seam.

声波反射法是目前顶煤厚度探测的有效方法之一。

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The greater the an and h_ ( an)~, the more favorable to the contact ratio while the more unfavorable to the thickness of the tooth top;

a n，h（an）~愈大，对重合度愈有利，但对齿顶厚变化愈不利。

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Research on Determination Method of Safety Thickness of Top Slab of Rock Bedding of Subgrade in Karst and Mined-out Region

岩溶及采空区路基岩层顶板安全厚度确定方法研究顺层围岩地下洞室的粘弹性稳定

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By this method one can obtain a higher contact ratio under conditions of no undercut and ensure thickness of tooth top, which is possible to be manufactured by the current machine tools and the standard cutters.

这种方法可以有效地增大端面重合度，并保证所设计的齿轮不根切、齿顶不变尖，可在现有机床上使用标准系列刀具加工。

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The adaptability study shows that reduced the temperature at subgrade top by increasing the thickness of the structure set the layer of graded crushed stone or asphalt macadam is benefit to protect the permafrost.

适应性研究表明，增加结构层厚度、设置级配碎石层或者沥青碎石层，一方面将导致路面结构基层融沉附加应力增大；另一方面能够有效的降低路基顶面温度，有利于保护冻土。

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The arrow of the slope is the longest, thus, following DCCA, the second axis shows that the slope from the bottom to the top is gradually decreasing, meantime, the thickness of litter layer is increasing.

坡度的箭头长度最长，故第二轴表示样方所在的坡度，即沿着DCCA第二轴从下到上坡度逐渐减小，枯枝落叶层厚度逐渐增大。

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Top of Britons' toilet paper wish list is softness ( 57%) followed by strength ( 45%) and thickness ( 36%).

英国人对厕纸的要求最高方面当属柔软度，占57%，紧随其后的是韧度，占45%，厚度，占36%。

四级真题- 2017年 6月 2卷 阅读A