The precision measurement of bevel cylindrical gear based on three dimension al shape;2. In this paper, based on the statistical data of the practical water irruptions, the three dimension al dispersion feature of water irruption is researched.

本文根據(jù)底板突水實(shí)例的統(tǒng)計(jì)資料黄色国产区，研究了突水災(zāi)害的空間分布規(guī)律一级黄片儿一级大a黄片啪；通過(guò)綜合分析煤層底板內(nèi)應(yīng)力測(cè)試三維有限元電算及相似材料模擬結(jié)果探討了底板突水災(zāi)害地下三維空間分布規(guī)律形成的原因人人靠人人干，為深入研究底板突水的防治提供了參

A given discourse, even if it can be identified as such, develops as much through sudden irruptions, transformations, contradictions, and differences as it does through constancy or regularity.

某一話語(yǔ)一级毛片免费播放在线视频尤，即使它可以被確認(rèn)為亚洲综合无码区在线观看，開發(fā)了通過(guò)突然irruptions 国产爽视频在线观看视频，變革，矛盾和分歧WWW欧美也操也射视频，因?yàn)樗煌ㄟ^(guò)恒彻圆谙逜级毛片；蛞?guī)律。

We no longer live in the days when terrible swarms within made irruptions, when one heard beneath his feet the obscure course of a dull rumble, when indescribable elevations from mole-like tunnels appeared on the surface of civilization, where the soil cracked open, where the roofs of caverns yawned, and where one suddenly beheld monstrous heads emerging from the earth.

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