equal diameter 中文意思是什麼

In adding - acid system : the resistivities of different lithotypes " cp tend towards being constant and equal when weight percentage of aniline exceeds 50 % ; because of the structure difference of different lithotypes, the polymerizing places and processes are different ; the resistivities of vituain / pan and fusain / pan reach the lowest point respectively when ( ntloisiog / an is 0. 6, 1. 0 ; the resistivities of cp decline fast and tend towards being constant along with the reduction of diameter of coal. in not adding - acid system : the resistivities of different lithotypes ' cp decline evenly ; it is found on the crossed experiment of cp, that ( nflsaog / an mole proportion is the most important factor to influence output ratio of cp and the weight percentage of aniline is the most important factor to influence resistivities of cp. according to the result of the crossed experiment of cp

在有外加酸體系中：苯胺百分含量大於50時，不同煤巖組分的電阻率趨于恆定和一致；由於不同煤巖組分結構上的差異，導致苯胺聚合場所和聚合過程的不同；當過硫酸銨/苯胺摩爾比為0 . 6 ， 1 . 0時，鏡煤-聚苯胺導電材料電阻率和絲炭-聚苯胺導電材料的電阻率分別達到最低值；在無外加酸體系中：不同煤巖組分/聚苯胺導電材料的電阻率隨著聚合時間的增加而均勻下降，並在8小時左右達到恆定；在對絲炭-聚苯胺導電材料進行的正交試驗中發現：過硫酸銨/苯胺摩爾比對產率的影響最大，苯胺重量百分比對產率影響最小，而對產物電阻率影響最大的是苯胺重量百分比。

The relationship between the holding temperature and the average of the equal - area - circle diameter or the average of the roundness was parabolic

而等溫溫度對最終球化組織的平均等積圓直徑和平均球化度的影響呈拋物線關系。

Ill 2, xi ' an university of technology 2. at the same holding temperature, when the holding time increased, the equal - area - circle diameter trended to uniform, and the distribution of the roundness approached to gaussian distribution

2 、相同等溫溫度條件下，改變等溫時間，等積圓直徑的分佈隨時間的延長趨向均勻，晶粒球化度接近於正態分佈。

3. at the same holding time, when the holding temperature changed, the number of the long equal - area - circle diameter grain increased, and the average of the equal - area - circle diameter lengthened, the average of the roundness heightened

3 、相同保溫時間條件下，改變等溫溫度，等積圓直徑大的晶粒隨溫度的升高而增加，球狀化程度高的晶粒數增多，平均等積圓直徑和平均球化度同時增大。

Disigning coolant channel on the firebox of liquid rocket engine to loxodrome ( equal - angle helix ) groove can improve firebox coolant capability greatly. because the width dimension of loxodrome groove is narrow and the depth is deep, some machining methods are incapable, such as end - milling or electrochemistry. according to the peculiarities, a cnc disk - cutter - milling method which is composed of five motion axes with four simultaneously interpolated ones is researched. because most firebox generatrix is composed of complex curves, it is very difficult to get cnc cutting program with manual means. in order to deal with the problem, the loxodrome mathematics model is studied, and an auto - programming software system is developed. the software system can generate cnc cutting program of loxodrome on many kinds of turned surface. the constriction - distension segment of firebox is the most representative workpiece. the sharp changing of its generatrix slope makes loxodrome milling difficult. with the theory analyzing and practice cutting experiment, some applied techniques, which include milling mode and direction, choosing cutter diameter and cutting start point setting, are developed. adopting the technology above, tens regular workpiece have been manufacturing. the two - year manufacture practice has confirmed the validity and feasibility of developed loxodrome coolant channel milling method. the developed technology is also worth to be referenced to other similar workpiece

將液體火箭發動機燃燒室的冷卻通道設計為斜航線（等傾角螺旋線）槽形，可以大幅度改善燃燒室的冷卻性能.斜航線冷卻槽的槽寬尺寸較小而槽深尺寸較大，所以無法使用棒銑刀銑削、電化學等加工方式.針對這些特點，提出了五軸控制、四軸聯動的數控片銑刀銑削加工方法.由於燃燒室外表面的母線輪廓復雜，手工編制數控加工程序難度大.為了解決數控加工程序的編制問題，研究了斜航線的數學模型，開發了自動編程軟體系統.使用該系統，可以生成多種母線輪廓回轉體外表面上的斜航線數控加工程序.燃燒室收斂-擴張段的母線斜率變化大，加工難度大，是斜航線冷卻通道加工的最典型工件.經過理論分析和實際切削實驗，研究了針對該類型工件的片銑刀直徑選擇、銑削方式和方向、刀具調整和起刀點的設置等多項實際的加工方案.採用上述的一系列技術，已經成功地加工了數十個合格工件.經過兩年多的實際生產過程應用，驗證了所開發的斜航線冷卻通道加工方法的正確性和可行性.這些加工技術的研製成功，對其他相似類型零件的加工亦具有參考意義

Pig receiver & launcher shall be horizontal, and the diameter of pig valves shall be equal to the inner diameter of the pipe cleaned

收發球筒採用臥式平放，收、發球閥的直徑應等於被清掃管線的內徑。

The reactions(forces)on each sphere were equal and opposite and directed along the diameter through the point of contact.

每個球上的反作用（力）大小相等方向相反，其作用方向沿著通過接觸點的直徑。

The centre of this wooden disc was hollowed out to a diameter equal to the exterior diameter of the columbiad.

這木盤中間留著一個直徑相當于哥倫比亞炮外徑的圓洞。

The average of the equal - area - circle diameter was changed from long to short and then to long, to short at last, as a wave. the average of the roundness was changed from low to high and to low again, as para - curve

平均等積圓直徑由大變小再變大再變小，呈波浪狀變化；而晶粒平均球化度則由小變大再變小，呈拋物線狀。

Bolts, reduced bihexagonal head, normal or pitch diameter shank, long length mj threads, metallic material, coated or uncoated, strength classes less than or equal to 1275 mpa - dimensions

強度級小於或等於1275mpa的塗層或未塗層金屬材料制標稱或節徑桿長長度mj螺紋扎制雙六角頭螺拴.尺寸

Bolts, normal spline head, normal or pitch diameter shank, long length mj threads, metallic material, coated or uncoated, strength classes less than or equal to 1100 mpa - dimensions

強度等級小於或等於1100 mpa的有塗層或無塗層長長度mj螺紋由金屬材料製成的標稱花鍵頭標稱或節徑桿螺栓.尺寸

Bolts, large hexagonal head, normal or pitch diameter shank, long length mj threads, metallic material, coated or uncoated, strength classes less than or equal to 1100 mpa - dimensions

強度等級小於或等於1100 mpa的有塗層或無塗層長長度mj螺紋的由金屬材料製成的大六角頭標稱或節徑桿螺栓.尺寸

Bolts, normal bihexagonal head, normal or pitch diameter shank, long length mj threads, metallic material, coated or uncoated, strength classes less than or equal to 1100 mpa - dimensions

強度等級小於或等於1100 mpa的有塗層或無塗層長長度mj螺紋的由金屬材料製成的標稱12角螺栓頭標稱或節徑桿螺栓.尺寸

Areospace - screws, pan head, internal offset cruciform ribbed or unribbed drive, pitch diameter shank, long length mj threads, metallic material, coated or uncoated, strength classes less than or equal to 1100 mpa - dimensions

航空航天.強度級小於或等於1100mpa的塗層或未塗層金屬材料制節徑桿長長度mj螺紋的內偏移十字形肋狀或非肋狀驅動的平頭螺釘.尺寸

Aimed at the equal - diameter cam mechanism with follower of planar movement, and according to two conditions of existing meaningful solution of the mechanism and of ensuring transmission angle of output swinging rod, the value selection ranges of cam motion angle, of swinging angle of out - put swinging rod and of its primary installation angle were analyzed and determined, and then proceed to plot the region graph of selectable value for motion angle of cam and swinging angle of swinging rod, thus provided convenience for the design and employment of that mechanism

摘要針對平面運動從動件等徑凸輪機構，根據機構存在有意義解和保證輸出擺桿傳動角兩個條件，分析並確定了凸輪運動角、輸出擺桿擺角及其初始安裝角的取值范圍，進而繪制了凸輪運動角與擺桿擺角的可選值域圖，為該機構的設計與使用提供了方便。

This text completely and systematically studies the status and the development of the pyrolysis and the fluidization of biomass, which distill the bio - oil in the domestic and international area, as well as the existing problems. this thesis primarily include following aspects : ( l ), by experimenting and measuring the energy ( heat value ) and the content of c, h, n chemical element of right 20 kinds of common biomass, on the base of the experimental result, and respectively established the biomass energy predict experiment formula with the element of h and c is from change, and passed the ro. os examination, which provides the basis and convenience for flash pyrolysis fluidization device energy to convert the rate to compute with biomass energy utilization calculation ; ( 2 ), proceeded the tg and dtg experimentation equal velocity ( 10 ? / min, 20 ? / min, 40 ? / min, 60 ? / min ) heating and constant temperature heating by studying on eight kinds of biomass samples, according to the experimental data and arrhenius formula, we established the dynamics model of pyrolysis of, then, using the goast - redfern and p function, we also solved the dynamics parameters and analyze out every kind of biomass ' s frequency factor and parameters of activation energy, and established the every kind of dynamics model of pyrolysis of biomass, all of these provide the theories and basis to make sure the reactor ' s flash pyrolysis work temperature scope design and the describing of pyrolysis reactor dynamics ; ( 3 ), in order to study and ascertain the process of heat completely getting to pyrolysis time of varied size biomass particles, we observed and measured the ratio of length and diameter ( l / d ) with the varied biomass through electron microscope, we concluded the l / d ratios usually is from 5. 0 to 6. 0, the average is 5. 3 ; ( 4 ), we studied the process of biomass transiting and the theory of complete pyrolysis time with the theory of complicated heat field, we got the time ( t ) of the varied size biomass particles arriving to complete pyrolysis, and we knew that the complete pyrolysis time and the time which get to the biggest production ratio are identical, all of these studies provide the theory base for design and forecasting the flash pyrolysis reactor solid state resort time ; ( 5 ), according to the above experiment result, synthesize to make use of the engineering the mechanics, engineering the material, machine the design to learn the principle, deduce, establish the theory of rotation cone flash pyrolysis reactor material resort time ( t ) and reasonable rotation velocity ( or frequency ) relation theory ; and ( 6 ), we gave the reactor ' s smallest cone angle certain, reactor cone wall strength design theory, the reactor production ability theory, the power design method and the critical rotation velocity theory

本文較全面、系統地綜述了國內外生物質熱解液化制取生物燃油技術研究發展現狀及存在的問題，主要研究內容有： （ 1 ）實驗、測定了20種常見生物質的能量（發熱量）和c 、 h 、 n元素含量，根據實驗結果分別建立了以h和c為自變量的生物質能量預測經驗公式，並通過r _ （ 0 . 05 ）檢驗；為閃速熱解液化裝置能量轉化率計算和生物質能量利用率計算提供了依據和方便； （ 2 ）選擇了8種生物質試樣作了等加熱速率（ 10 min 、 20 min 、 40 min 、 60 min ）和恆溫加熱的tg和dtg實驗，根據實驗數據和阿倫尼烏斯公式建立了生物質熱解反應動力學微分方程，並採用goast - redfem積分法和p函數對其動力學參數進行了求解，解析出各種生物質的頻率因子和活化能參數，進而建立了各種生物質的熱解動力學模型，為科學確定反應器的閃速熱解工作溫度范圍及熱解反應動力學描述，提供了理論和依據； （ 3 ）為研究和確定不同尺度的生物質顆粒中心達到全熱解的時間，在體視顯微鏡下對不同粒度的生物質顆粒的長徑比進行了實驗觀察和測定，得出生物質的長徑比（ l d ）一般在5 . 0 6 . 0之間，平均為5 . 3的結果； （ 4 ）採用復雜溫度場傳熱學理論對生物質傳熱過程及充分熱解時間理論進行了研究，解析推導出了不同尺寸生物質顆粒中心溫度達到充分熱解溫度的時間（ t ） ，得出了理論推導的充分熱解時間與最大產油率的熱解時間相一致的結果，為閃速熱解反應器固相滯留時間設計和預測提供了理論依據； （ 5 ）根據上述實驗結果，綜合運用工程力學、工程材料、機械設計學原理，推導、建立了轉錐式閃速熱解反應器物料滯留時間（ ）與轉速（或頻率）合理匹配理論； （ 6 ）提出了轉錐式閃速熱解反應器的最小錐角設計、錐壁強度設計、生產能力設計理論和功率計算方法及臨界轉速理論等。

The ultrasonic testing of the hole quality of the non - equal diameter drilling pile

超聲波檢測技術在樁端壓漿樁中的應用

The parameters are measured respectively during the experimental process, such as bearing capacity, deformation, strain and so on. it concludes that when the other conditions is equal, the limit bearing capacity of the concrete filled steel tube long column subjected to axial compress is reduced along with the long diameter ratio increased

從試驗結果可以看出：鋼管混凝土軸心受壓長柱的穩定承載力，在其他條件相同時隨長細比的增大而逐漸降低；試件在最大承載力狀態下，鋼管表面的平均縱向應變已超過鋼管的屈服應變值，破壞呈現為非彈性失穩破壞。

Comparative study on belled and equal - diameter piles

同場地擴底樁和直樁的對比研究

Type, dimensions and specifications of equal - dimameter three - way and equal - diameter four - way pn 250 mpa valves

Pn250mpa等徑三通等徑四通型式尺寸和技術條件