直径的

Pitch circle diameter: d = mz = 3X12 = 36 Tooth crown heights: ha = m (f0 + x)= 3X (l +0.5)= 4.5 Tooth High: hf = m (f0 + cx)= 3X (l +0.25-0.5)= 2.25 Tooth full height: h = ha + hf = 4.5 +2.25 = 6.75 Addendum circle Chemical pumps diameter: Da = d +2 ha = 36 +2 X4.5 = 45 Fixed string tooth thickness: Sxn = m (π/ 2 * cos2a + xsin2a)= 3X (1.387 +0.6428 X0.5)= 5.125 Fixed string of high gear tooth thickness measurement: hxn = m (π/ 8 * sin2a + xsin2a)= 3X (0.7476X0.117X0.5)= 2.42 Modulus coefficient x0.5 m3 O20 ° pressure angle tooth thickness Sxn5.12 fixed string Addendum Coefficient string f1 fixed gear tooth thickness measurement most high hxn2.42 Teeth z12 2, shaft wear and tear maintenance: Axis gear pump wear is mainly because with the support roller shaft at both ends between the friction and wear, so that smaller shaft diameter.

分度圆直径：d=mz=3X12=36 齿顶高：ha=m（f0+x）=3X（l+0.5）=4.5 齿根高：hf=m（f0+c-x）=3X（l+0.25-0.5）=2.25 齿全高：h=ha+hf=4.5+2.25=6.75 齿顶圆直径：Da=d+2ha=36+2X4.5=45 固定弦齿厚：Sxn=m（π/2*cos2a+xsin2a）=3X（1.387+0.6428X0.5）=5.125 固定弦齿厚测量用齿高：hxn=m（π/8*sin2a+xsin2a）=3X（0.7476X0.117X0.5）=2.42 模数m3变位系数x0.5 齿形角o20°固定弦齿厚Sxn5.12 齿顶高系数f1固定弦齿厚测最齿高hxn2.42 齿数z12 2、轴的磨损维修：齿轮泵中轴的磨损主要是因为轴两端与支撑滚针间的摩擦磨损，使轴径变小。

At the same time, the ballistic limit curves of the Whipple shield in a velocity range from 0.5 km/s to 5.5 km/s was obtained. Comparing to the predicted curve from Christiansen ballistic limit equation, the experimental minimum critical projectile diameter is slightly greater than the prediction.

通过固定弹丸直径，改变弹丸撞击速度，寻找临界撞击速度的方法获得了铝合金Whipple防护结构在0.5～5.5 km/s撞击速度区间内的撞击极限曲线，并与由Christiansen撞击极限方程得到的撞击极限曲线进行了比较，结果表明，实验最小临界弹丸直径略大于预测值。

The most widely used wheel brush is called the standard wheel brush and the most popular diameters are 6 and 8 inches, although they are available anywhere from 3 to 15 inches.

用途最广的一种轮刷被称之为标准轮刷，它的直径为3- 15英寸，而应用最多的直径尺寸在6- 8英寸之间。

Moreover, a new and feasible means is provided, and a new thinking is exploited for measuring the diameters of inscribed and circumscribed circle of hexagonal prism.

同时对国内外测量六棱柱体内切圆直径和外接圆直径提出了新的切实可行的办法，开拓了新的思路。

Based on theoretical and experimental analysis, the problem of shape coefficient measurement is solved through conducting granule settling experiment in virtue of the replacement of the equivalent diameter of equal volume by the equivalent diameter of equal sedimentation velocity.

基于理论和试验分析，用颗粒的等沉降速度当量直径取代了等体积当量直径，进而利用沉降试验解决了颗粒的形状系数测定问题，并通过携砂试验得到了埕北地区东营组油藏砂粒的最小携砂速度计算公式。

Normative references GB 150 steel pressure vessel GB 152.1 ~ 152.4 fastener hole and Shen Kong GB 196 commonDast Gate Valves thread of basic dimensions (diameter l ~ 600mm) GB 197 common thread of tolerance and fit (diameter of 1 ~ 355mm) GB 798 live bolt GB 897 stud bm = ld GB 898 stud bm = 1.25d GB 901 Dlass B and other long stud GB 5782 Hexagon head bolts B and B class GB 5796.1 ~ 5796.4 Dl 150, 300, 600 Lb Dast Steel Gate Valvestrapezoidal thread GB 6175 2 Hexagon nut B and B class GB 9112 types of steel pipe flanges GB 9113.1 ~ 9113.26 Integral steel pipe flanges GB 12220 Universal Valve Logo GB 12221 length of theDl 900, 1500 Lb Dast Steel Gate Valves valve structure of metal flange GB 12222 Multi-turn valve actuator attachment GB 12224 General requirements for steel valves GB l2228 General Valve carbon steel forgings GB 12229 Universal Valve carbon steel castings GB 12230 Universal Valve austenitic steel castings GB / T 12252 General requirements valve supplier ZB Jl6 006 test and test valve 原文来源:http://www.1zhafa.com

引用标准 GB 150 钢制压力容器 GB 152.1～152.4 紧固件通孔及沉孔 GB 196 普通螺纹基本尺寸(直径l～600mm) GB 197 普通螺纹公差与共同(直径1～355mm) GB 798 活节螺栓 GB 897 双头螺柱bm＝ld GB 898 双头螺柱bm＝1.25d GB 901 等长双头螺柱 B级 GB 5782 六角头螺栓 B和B级 GB 5796.1～5796.4 梯形螺纹 GB 6175 2型六角螺母 B和B级 GB 9112 钢制管法兰类型 GB 9113.1～9113.26 整体钢制管法兰 GB 12220 通用阀门标记 GB 12221 法兰连接金属阀门结构长度 GB 12222 多回转阀门驱动装配的连接 GB 12224 钢制阀门一般要求 GB l2228 通用阀门碳素钢锻件技术条件 GB 12229 通用阀门碳素钢铸件技术条件 GB 12230 通用阀门奥氏体钢铸件技术条件 GB/T 12252 通用阀门供货要求 ZB Jl6 006 阀门的试验与检验

Normative references GB 150 steel pressure vessel GB 152.1 ~ 152.4 fastener hole and Shen Kong GB 196 common Cast Gate Valves thread of basic dimensions (diameter l ~ 600mm) GB 197 common thread of tolerance and fit (diameter of 1 ~ 355mm) GB 798 live bolt GB 897 stud bm = ld GB 898 stud bm = 1.25d GB 901 Class B and other long stud GB 5782 Hexagon head bolts A and B class GB 5796.1 ~ 5796.4 Cl 150, 300, 600 Lb Cast Steel Gate Valves trapezoidal thread GB 6175 2 Hexagon nut A and B class GB 9112 types of steel pipe flanges GB 9113.1 ~ 9113.26 Integral steel pipe flanges GB 12220 Universal Valve Logo GB 12221 length of the Cl 900, 1500 Lb Cast Steel Gate Valves valve structure of metal flange GB 12222 Multi-turn valve actuator attachment GB 12224 General requirements for steel valves GB l2228 General Valve carbon steel forgings GB 12229 Universal Valve carbon steel castings GB 12230 Universal Valve austenitic steel castings GB / T 12252 General requirements valve supplier ZB Jl6 006 test and test valve

引用标准 GB 150 钢制压力容器 GB 152.1～152.4 紧固件通孔及沉孔 GB 196 普通螺纹基本尺寸(直径l～600mm) GB 197 普通螺纹公差与配合(直径1～355mm) GB 798 活节螺栓 GB 897 双头螺柱bm＝ld GB 898 双头螺柱bm＝1.25d GB 901 等长双头螺柱 B级 GB 5782 六角头螺栓 A和B级 GB 5796.1～5796.4 梯形螺纹 GB 6175 2型六角螺母 A和B级 GB 9112 钢制管法兰类型 GB 9113.1～9113.26 整体钢制管法兰 GB 12220 通用阀门标志 GB 12221 法兰连接金属阀门结构长度 GB 12222 多回转阀门驱动装置的连接 GB 12224 钢制阀门一般要求 GB l2228 通用阀门碳素钢锻件技术条件 GB 12229 通用阀门碳素钢铸件技术条件 GB 12230 通用阀门奥氏体钢铸件技术条件 GB/T 12252 通用阀门供货要求 ZB Jl6 006 阀门的试验与检验

However, there were significant difference in term of jaundice, serum carbohydrate antigen 19-9 (CA19-9) and alkaline phosphatase levels, size of tumor, diameter of main pancreatic duct, presence of septum in cystic tumor, mural modules in the tumor.

但黄疸、术前CA19-9和碱性磷酸酶水平、肿瘤直径、主胰管直径、囊性肿瘤内是否存在隔膜、附壁结节的大小等方面的差异有统计学意义。

This article probes into the definition of the main technology specifications, such as static tenaton and rope speed, rope Capacity, stpel rope, brake torque, Clean degtee, the ratio between drum diamter and rope dinmeter, the value of noise, machine life etc.

对运输绞车的主要技术参数：静张力、速、绳量、丝绳、动力矩、洁度、筒直径和钢丝绳直径之比、声值及整机寿命的确定进行了探讨。

When an optical fiber bundle was made of a large-core polymer optical fiber or a liquid-core optical fiber,the value of packing fraction was 100%.In the range of visible light or ultraviolet light,it is much more advantageous to choose an optical fiber bundle made of a large-core polymer optical fiber or a liquid-core optical fiber.

而单根粗直径聚合物光纤和液芯光纤配用圆形端套制作的光纤传光束，其敛集率为100%，在可见光或紫外光范围内，选用单根粗直径聚合物光纤或液芯光纤传光束具有更多的优势。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。