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drainage by high position 高位抽放
The reasonable layer selection is the main influencing factors for gas drainage by high level borehole,the borehole parameters is based on the caving & fracture zone height of gob. 高位钻孔抽放最主要的影响因素是合理层位选择,其钻孔参数应根据采空区冒落带及裂隙带高度来设计。
Clouds scudded across the sky driven by high winds. 劲风吹著飞云掠过天空。
The house was surrounded by high walls. 房子的四周有高墙。
He has a high position in society. 他社会地位很高。
The prison is encompassed by high walls. 监狱被高墙围绕着。
The official was accompanied by all the pomp of his high position. 那位官员所到之处威风十足。
His work has attained a high position in the republic of letters. 他的作品在文坛上获得了崇高的地位。
She got to her present high position by plotting and intrigue. 她通过耍阴谋诡计取得了目前这样高的地位。
Characterized by high volume and intensity. Used of sound. 大声的以高音量和强烈为特征的。用于声音
The pillbox was blown to pieces by high explosive. 碉堡被烈性炸药炸得粉碎。
His conduct do not comport with his high position. 他的所作所为，实在不配担任那样高的职位。
His manner reeks high position with high pay. 他的气派表现得好像是个高官厚禄的人物。
The city is shut in by high hills on every side. 这座城市四面环山。
The sails were ripped in two by high wind. 船帆被大风撕成两半。
"The tragedy has put Bali on a high position. 在谈到目前已经几名主要嫌疑犯被捕时，他说："惨剧把巴厘岛放到了一个很高的位置上。
The tanks were blown to pieces by high explosives. 坦克给烈性炸药炸成碎块了。
He prefers honest poverty to a high position obtained by questionable means. 他宁愿清贫不苟且，不愿钻营以谋高官厚禄。
The courtyard was shaded by high trees. 庭院荫庇在大树下。
High position bores and elevation bores methane drainage technique can prevent gas problem successfully. 采用高位钻孔和仰角钻孔抽放瓦斯技术,有效地防止了瓦斯超限。