diamond ore 中文意思是什麼
diamond ore
解釋
鉆石原石-
By the end of 1998, minerals that had been discovered, confirmed and explored included : cyanite, silex ， quartz ， xanthoconite, others that need proving up and exploring included : mica, phosphorite, diamond, rutile, crude oil, kalium ore, etc
至1998年底，發現、探明並已開發利用的礦種有：藍晶石、硅石、石英砂、黃砂，有待探明和開發利用的礦種有雲母、磷礦石、金剛石、金紅石、石油、鉀礦石等。 -
The article introduces the basic concepts and common methods of fuzzy mathematics, initially discussing the applications of fuzzy mathematics in the following aspects : 1 ) division of " skidding " strata with grade of membership that are drilled with diamond bits ; 2 ) comprehensive evaluation on the application in evaluation of diamond bits, classification of rock drillability, and evaluation of clay ; 3 ) classification of " hard rock " through fuzzy clustering analysis ; 4 ) estimation of completion time of boreholes and evaluation of underg round water with fuzzy mathematics ; 5 ) identification of new ore areas and option of best water resource area with fuzzy model ; 6 ) option of diamond bits and evaluation on oil field development plan with fuzzy resemble option and the improved calculation method ; ? ) prediction of mud slurry performance and of the amount of surging water in ore pits with fuzzy control ; 8 ) comprehensive evaluation of diamond bits and supporting plan of deep foundation pit with fuzzy optimal theory
初步探討了以下幾方面的應用： 1 ）用隸屬度劃分金剛石鉆進「打滑」地層； 2 ）綜合評判在金剛石鉆頭評價、巖石可鉆性分級及鉆探造漿粘土評價中的應用； 3 ）用模糊聚類分析進行「硬巖石」分類； 4 ）用模糊數進行鉆孔竣工時間預估及地下水質評價； 5 ）模糊模式識別在新礦區類型識別和最佳水源地選擇中的應用； 6 ）模糊相似選擇及其改進演算法在金剛石鉆頭選擇和油田開發方案評價中的應用； 7 ）模糊控制在泥漿性能和礦坑涌水量預測中的應用； 8 ）優化理論模型在金剛石鉆頭和深基坑支護方案綜合評價中的應用。 -
The main products china exports to africa are machinery and electronics, textile and apparel, hi - tech products and finished goods, while imports from africa concentrate on crude oil, iron ore, cotton, diamond and other natural resources and primary goods
中國向非洲出口產品主要是機械和電子、紡織、服裝、高科技產品、成品，同時從非洲進口集中於原油、鐵礦石、棉花、天然鉆石及其他資源和初級產品。 -
First of all, diamond for personal adornment must be in very fine quality. only a small proportion, about 20 % of the ore, conforms to the requirement
首先，個人裝飾用的鉆石必須是優質的。只有很小的比例，約20的礦砂符合要求。
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