In the course, the condition and the process of forming and changing of minerals, the typomorphic features of minerals, the characteristics of the distribution and the evolution of minerals and their paragenetic associations in the period and the space, the methods of mineral analyses and research, the geological thermometers and the geologicial barometers of minerals, mineral paragenetic associations and paragenesis analyses will be introduced, and the magnificent and the microscopic genetic characteristics of pyrite, quartz, garnet, pyroxene, amphibole, mica, feldspar, and other minerals will be dealt with particularly
本課程主要講述礦物及其共生組合的形成和變化的條件和過程，不同物理化學條件下礦物的成分、結構、形態、物性等標
型特徵以及它們之間的內在聯系，礦物及其共生組合在時間上和空間上的分佈和演化規律，礦物成分、結構、形貌、物性等的分析測試方法，礦物地質溫度計和地質壓力計對其形成環境的表徵，不同體系（封閉體系、開放體系）條件下，礦物的穩定范圍和彼此替代順序的共生分析，重點介紹黃
鐵礦、石英、石榴石、輝石、角閃石、雲母、長石等礦物（族）在成因上的宏觀標志和微觀信息，以及其成因信息在成巖作用和成礦作用中的地質意義。
In view of the natural conditions in loess area of gansu, in the light of investigation conditions of seepage of built loess and weak rock highway tunnels in this area and classification of water gushing conditions for railway tunnels, and by engineering analogism, the classification of tunnel water gushing types suited the structure design of highway tunnel waterproof and drainage, and the three methods for checking and subdividing water gushing types are presented
摘要針對甘肅黃土區的自然條件，依據該地區已建黃土及軟巖公路隧道滲漏水調查情況和
鐵路隨道涌水狀態分類，運用工程類比法提出適合該地區公路隧道防排水結構設計的隧道涌水類
型劃分及對涌水類
型校核與細分的三種方法。
Main material for installing : all kinds of channel steel, angle iron and plate iron
（六）安裝主要材料：各種
型號的槽鋼、角
鐵及
鐵板。
The bite shape of this machine absolutely replace angle iron flange. the form is efficiently finished, with artistic appearance
本機咬口形狀完全替代風管製作中的角
鐵法蘭，成
型高效、美觀，令您省料、省工、省時。
The current transformer is fully enclosed. the primary and secondary windings and iron core are insulated by epoxy resin. it has a good ability of antipollution and moisture proof
本
型電流互感器為全封閉結構，一、二次繞組及
鐵芯均澆注在環氧樹脂內，耐污染及潮濕。
The current transformer is fully enclosed structure. the primary and secondary windings and iron core are insulated by epoxy resin. it has a good ability of antipollution and moisture proof
本
型電流互感器為全封閉結構，一、二次繞組及
鐵芯均澆注在環氧樹脂內，耐污染及潮濕。
The current transformer is fully enclosed and busbar structure. the secondary windings and iron core are insulated by epoxy resin. it has a good ability of antipollution and moisture proof
本
型電流互感器為全封閉母線式結構，二次繞組及
鐵芯均澆注在環氧樹脂內，耐污染及潮濕。
A comparison of the prospecting model of the hf type with the prediction model of the vms type reveals that their thermal dynamic mechanisms are different : the former is related to basic - ultrabasic rock intrusion, while the latter to acidic rock intrusion
與白銀銅礦區域地球化學預測模式相比較，富
鐵型鉛鋅礦床中除
鐵族元素指示基性超基性巖侵入事件外，其他元素均大致相似，兩大類礦床形成的初始熱動力條件不同。
Application and technology of foundry method in permanent mould with sand facing
鐵型覆砂鑄造工藝及其應用
The model holds that the metallogenic environment of the lf type is structural reductive space whereas that of the hf type reflects entirely characteristics of sedimentary minerallization, with no evidence of tectonic minerallization
模式表明，貧
鐵型礦床的成礦環境為相對封閉還原的構造空間；富
鐵型礦床完整地反映了該類
型鉛鋅礦床沉積成礦特點顯著，而斷裂等構造對成礦的直接影響相對不顯著。
B20 10 nov. 2005 umekoji steam locomotives museum from 1944 to 1945, the manufacturing industies, tateyama, and jnr kouriyama works, had produced the 15 cars of this class
B20
型是國
鐵型號中最小的蒸汽機車而且是唯一的飽和蒸汽機車，而但沒有空氣制動裝備蒸氣制動。
The sand faced - iron mould casting process is a special iron castings production process, according which castings are to he cast in the iron moulds having a thin layer of the resin sand facing in their inner surfaces
摘要
鐵型覆砂鑄造是指在金屬
型（
鐵型）內腔覆上一薄層樹脂砂，然後採用這種覆砂
鐵型澆注鑄件。
Since the sand faced - iron mould has high rigidity, it is possible, when used for crankshafts production, to adopt feeder - less foundry method and increase the process yield, as well as increase dimension accuracy of castings and improve surface quality of castings
由於覆砂
鐵型剛度較高，用於球
鐵件能實現無冒口鑄造，提高工藝出品率，並能提高鑄件尺寸精度，改善表面質量。
In this paper, with the metallogenic series theory as the guide and the geochemical data as the basis, all lead - zinc ore deposits in the region were classified into two sub - series, i. e., lf type ( with low content of iron group elements ) and hf type ( with high content of iron group elements ), and a regional geochemical prognostic model was set up by using the logical information method
摘要以成礦系列理論為指導，將區域內的鉛鋅礦按地球化學特徵劃分為貧
鐵型和富
鐵型2個亞系列，進而用邏輯信息法建立了西秦嶺鉛鋅礦床區域地球化學場預測模式，驗證結果較為理想。
Casting solidification simulation of sand faced permanent iron molding technology and its application
鐵型覆砂鑄造工藝凝固模擬及應用
The basic principle of this process, its development situation and the application of computer solidification simulation in this process were introduced
筆者介紹
鐵型覆砂工藝的基本原理、發展情況以及計算機凝固模擬在該工藝上的應用。
In this paper the technolqical principle, furnish and application status of permanent mould with sand facing was introduced. application shows that the technology was suitable for mass production of high quality casting, suchas crankshaft ， valve and cylinder sleeve
介紹了
鐵型覆砂鑄造的工藝原理、工裝及生產應用情況，應用表明：該工藝適用於曲軸、閥體、缸套等大批量、高質量的鑄件生產。
Iron and steel material shaped
鋼鐵型材
