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In this paper, a lot of research works of algorithms of mining CAD has been done. Many important mine specialty graph operation algorithms have been put forward. The main results are as follows: polygons cut out algorithm, two close polygons mutual, merge and subtract algorithm, polygon vector fill, any vector polygons area calculating and sequence polygons or multifold which has the direction and region area calculating, curve smoothing, graph element search for any region, graph element attrib collect in any region, parallel polygon or vector intersection-point push out or pull in, ore reserves and grade calculating for any type polygon, mine spatial data searching and boundary line tracking and automatic link algorithm etc.

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At present the company's total area of 8866 square meters, building area of 3800 square meters, with 5T lane 5 Units, 3T lane 2 Units, 148 Units 2 molding machine, molding machine 145, a swinging-type molding machine compaction several Units, 1T intermediate frequency electric furnace 2 Units, 6 cubic meters of a heat treatment furnace, 378E dual-hook hanging behind Units 1, roll cast, thrown barrels machine one of the Units, resin sand reclamation and reuse a set of sand, chemical analyzer 1 kits, Units 1 Rally machine, metallographic analyzer analyzer casthouse, hardness machine one of the Units.

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Vegetation types in mountainous area of West Lake4 groups of vegetation type, 7 vegetation types, 14 formation groups and 25 formations were present in mountainous area of West Lake, according to taxonomic approach and divisory principle in Vegetation of China and Forest of Zhejiang.

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Lidu develops into the mountain villa of Lidu of today from only hotel of 1000 square meters of a area of business,the area of business is up to 20,000square meters,collect food and beverage,amusement,fitness,meeting and an organic whole, have a comprehensive service place of the ecologival garden type,besides joint efforts of the staff of Lidu,it is due to your energetical support and treat kindness to us even more.

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Based on analysis of the current state of the flow pattern modeling abroad and at home, explains the meaning of the mathematical simulation of the flows in the valve.(2) Comparing flow simulation data of jet pump with its experimental one, the feasibility and reliability of FLUENT used for flow simulation are proved.(3) Based on the characteristic of valves, the fluid field analysis of specific ring-spray type flow-adjustable is finished. The valve structure is optimized to meet the need, which makes it have such advantages:(1)smaller vortex area and faintish vortex intensity, so the vibration of vortex is controlled effectively;(2)the pressure is distributed more equality, the transition area is larger.

論文的主要內容包括：(1)簡述了閥門研究的現(xiàn)狀與發(fā)展，在分析與總結國內外流體流動模擬研究的基礎上在线观看国产小视频一区，探討開展閥門內水流運動數(shù)值模擬的意義国产精品久久久久久免费；(2)對特定型號的射流泵進行了內部流場的數(shù)值模擬研究，并與實驗數(shù)據(jù)相比較日韩毛片一级毛片免费视频，驗證了應用Fluent進行數(shù)值模擬的可行性和可靠性在线国产福利；(3)針對調流閥的特點，對特大口徑環(huán)噴式流量調節(jié)閥進行流場計算中国熟妇色視頻一区二区，其設計指導思想如下： 1嘿咻嘿咻无码人妻视频、控制旋渦，減小旋渦區(qū)，減小渦的強度免费看huang片的网站； 2国产a级毛片黄片、控制壓力分布，使閥體受力更均勻一级全裸操逼免费视频，改善局部應力狀態(tài)欧美日韩一区激情小说图片，提高閥門使用的安全性； 3a亚洲男人的天堂黄色美丽网站、最小絕對壓力高于水的汽化壓力中国免费的一级A片，不產生汽蝕。

In source area Haiti area, nature happy dry, colored shape like wheat fringy, has the tall and slender stem to do, on the flower covers the star type fine fur, on the end is blooming the small indigo blue flowers, the narrow long leaf blade assumes the greyish-green, Cheng Zhushi Gao Keda 90cm, usually blossoms in June.

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In order to explore the grain-size distribution characteristics and geo-genetic types of land desertification in Mo Us desert, the research on the grain-size characteristics of sediments since late Pleistocene has been carried out in the desert area and neighboring area such as inside desert, sand covered loess plateau, loess plateau and river valley. The research result shows that sediments of different geologic genetic types are the fundamental material source of sandy desertification in these areas and the distinguishing of different types of the sediments is the theoretical basis of classification of different geogenetic type of sandy desertification. The contribution of different geological roles on the land desertification and its significance to prevent and deal with the land desertification have also discussed.

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The area of the geosynclinal structural layer in Diwa Region is favourable area for looking for greenstone belt type and metahydrothermal gold deposits.

在地洼區(qū)內有前地槽構造層或地槽構造層分布區(qū)尋找綠巖型金礦或變質熱濃型金礦。

The inland arid area of China is very broad,such as Hexi corridor of Gansu Province, Ta Limu Basin and Zhun Ge'er Basin of Xinjiang Uygur Autonomous Region, Chai Damu Basin of Qinhai Province that are all the type of Gobi and generated by the dry climate condition. There are broad plain area and abundance heat resources of sun in these basins.

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