pre-drill 中文意思是什麼
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Kongxi buried hill shows following features in the seismic profiles : the structures are asymmetric. there is flexural syncline on the east side and a monocline on the west side. asymmetric repetition of stratigraphic units is present in the drill wells and the dips of beds and faults are gentle. the permo - carboniferous system of both sides almost lie in the same slope and the events of cambrian or upper proterozoic are continuous from east to west. the phenomenas suggest that kongxi buried hill could be a thrust belt been traced which consists of reverse faults. the imbricate faults mainly effect pre - jurassic strata. there are obvious angular unconformity between jurassic - cretaceous system and paleozoic involved deformation of thrust. the thrust front in some place has cut off the beds of jurassic - cretaceous system. the structural style of the thrust structure changes along the strike of the kongxi buried hill
地震和鉆井資料揭露的孔西構造帶前第三系潛山的地質特徵可以歸納為：構造帶總體上不對稱構造帶內部有地層重復現象石炭二疊系地層的位置明顯高於兩側的同一地層的高度。用由34條向東傾斜的逆沖斷層組成的疊瓦扇構造模式能夠比較合理地解釋上述地質特徵。該帶向東傾斜的逆沖疊瓦狀斷層組主要影響前侏羅系地層，侏羅白堊系與捲入逆沖構造變形的古生界地層之間有明顯的角度不整合。 -
In the special fields machine tools for various materials, wall saws, road, rail and canal construction or beyond that with diamond tools with polished diamonds glass cutting diamonds, diamond drills, crack cutter, stones, boards, pipes, pre - assembled units as well as with drill machine, building construction and / or with circular saw blades and industrial and refuse technology is cedima gmbh well - known
Cedima gmbh是一家現代化的、可靠的產品供應商，這家供應商從事鉆床、打孔機，金剛石工具，切割器，圓鋸片、鋸片銑刀，臺鋸，鋸片、鋸條，石材加工，墻面鋸，張緊機械（張緊分離） ，用於各種原料的機械工具，地上建築，街道、軌道和渠道建築，石、板材、管道、成品，工業和垃圾處理技術，通用空氣技術的製造、銷售。 -
High grade alum hair brush, nature finish. anodized plating finish, all panel and body without any of pre - drill and printing, enable to offer for fully own designing application
高級鋁本色，發絲陽極表面處理，面板和機體沒有印刷和鉆孔，完全適合自己打造所需 -
At first, the author has analyzed the theory, mechanism and shock - absorption in pre - split blasting, studied the rising of crack, expanding and stopping, and did various factors which influence on the crack of rock in pre - split blasting. the main factors have been determined to be the strength of mineral and rock, the diameter of drill, the type of explosive and the growth degree of crack. then, the author has researched bp neural networks " work principle, structure and defectiveness
首先分析了巖石成縫的理論、機理和減震作用，研究了裂紋的起裂、擴展和止裂；分析了各種因素對巖石預裂爆破成縫的影響，確定了礦巖強度、孔徑、炸藥類型和裂隙發育程度作為主要影響因素；並研究了bp神經網路工作原理、結構和缺陷，把改進的bp神經網路運用在巖石預裂爆破參數設計中，建立以礦巖強度、孔徑、炸藥類型和裂隙發育程度為主要影響指標的bp神經網路的預裂爆破參數設計識別模型；運用matlab6 . 5語言開發了爆破參數設計的智能系統，實現了預裂爆破參數設計的自動化，用工程實例驗證系統模塊的功能。
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