By analyzing and researching on methane concentration in the monitoring space of adjacent sensors, function relationship between interval, alert time, air flow velocity and section area of roadway is concluded while theory base and methods of sensor interval is put forward for relative safety criterion.

結(jié)果表明：巷道瓦斯平均濃度與風(fēng)速www.亚洲com.第四页、巷道截面積无码免费黄片、瓦斯涌出強(qiáng)度大屌操屄视频、傳感器間距之間存在一定的函數(shù)關(guān)系国产成人影院在线观看，礦井監(jiān)控系統(tǒng)所需要的最短響應(yīng)時(shí)間是目前迫切需要解決的問題偷拍偷窥网。

Dr Chatterjee's analysis shows that it formed from a sudden upwelling of magma that destroyed the Earth's crust in the area and pushed the mountain upwards in a hurry.

查特吉教授的分析表明這座山是由于巖漿突然涌出而形成的色视频网站观看，這些巖漿摧毀了這一地區(qū)的地殼，并迅速將這座山向上推起。

Dr Chatterjee therefore suggests that an object 40km in diameter hit the Earth off the coast of India and forced vast quantities of lava out of the Deccan Traps.

Chatterjee 博士因此提出国产伦频网，一個(gè)直徑40公里的物體在離印度海岸不遠(yuǎn)的地方撞上了地球看h片的网站，并迫使大量的熔巖涌出了 Deccan Traps。

Some abrasive would effuse from the abrasive tank after stopping the power in DIAJET.And the abrasive led much abrasion on the elements, especially on the nozzle.

針對(duì)前混合磨料射流系統(tǒng)存在的磨料涌出而導(dǎo)致對(duì)系統(tǒng)管件国产精品久久九九免费视频，尤其是噴嘴產(chǎn)生磨損的問題免费看的国产区视频，對(duì)原有的射流系統(tǒng)進(jìn)行了分析。

The closed thought curtains began to open, a figure of five years ago is here.

嚴(yán)閉的心幕亚洲v欧美v日韩Ⅴ中文字幕，慢慢的拉開了波多野结衣性爱视频，涌出五年前的一個(gè)印象。

He wrote that book and in it he told a beautiful story which welled from his heart's deepest dreams and yearnings.

他寫了那本書99超碰碰，在書里国产精品免费一区二区久久，他說了一個(gè)美麗的故事，從中涌出從他內(nèi)心深處的夢想和渴望自拍人人爱人人操。

It was a peaceful still water in the midst of the din of Calle San Blas, the noisy and feverish commercial thoroughfare along which the center of the city emptied out at six in the afternoon.

Calle San Blas一帶嘈雜喧囂国产精品99久久精品2020，到下午六點(diǎn)，熙熙攘攘的潮水沿著這條商業(yè)大街涌出市中心狼友视频在线免费播放，Mundo書店無疑是那里的一泓靜水张津瑜落地窗国贸。

Hence, it has been developing rapidly since 1930s and many new branches have emerged from time to time. Limit Theory is one of the branches and also an important theoretical basis of science of Probability and Statistics.

它在自然科學(xué)、技術(shù)科學(xué)清纯激情欧美、管理科學(xué)中都有著廣泛的應(yīng)用欧美日韩色一区二区三区视频，因此從上個(gè)世紀(jì)三十年代以來，發(fā)展甚為迅速在线高清无码黄片，而且不斷有新的分支學(xué)科涌出性爱小视频欧美。

As the leading edge of one plate is consumed beneath the other, some of the magma finds its way up between cracks and crevices in the continental crust.

隨著一個(gè)板塊的前邊緣被淹沒在另一個(gè)之下，有些巖漿會(huì)順著大陸地殼中的裂縫和縫隙向上涌出999国产精品欧美久久久久久。

As the leading edge of one plate is consumed beneath the other, some of the magma finds its way up between cracks and crevices in the continental crust.

隨著一個(gè)板塊的前邊緣被吞噬在另一板塊之下十八黄色网站，有些巖漿會(huì)順著大陸地殼中的裂縫和縫隙向上涌出。