外径

In this paper, Smith's finite difference solution of one-dimensional wave equation is applied to two prototype steel pipe testpiles 900 mm o.

本文将一维波动方程的史密斯差分解应用于华北渤海油田的两根开口打入的原型钢管试桩(外径900毫米，变壁厚、桩长分别为69及72米)。

In this paper, Smith's finite difference solution of one-dimensional wave equation is applied to two prototype steel pipe testpiles(900 mm o.d.with variable wall thickness and lengths of 69 and 72 m)which were driven with open ends in the Bohai oil field of North China.

本文将一维波动方程的史密斯差分解应用于华北渤海油田的两根开口打入的原型钢管试桩(外径900毫米，变壁厚、桩长分别为69及72米)。计算结果与现场实测值(包括以后所进行的静荷载试验)相比甚为符合。

Out diameter of fire resistant cable with cross section more than 25mm2 is bigger than that of common cable by 25%.

4， 耐火电缆的参考外径，截面在25mm2及以下的比普通同型号的产品规格大15%，截面在25mm2以上的比普通同型号产品规格大25%。

The burner to produce the test flame shall consist of a tube that is at least 35 mm (1.38 in) long and has a bore of 0.4 to 0.6 mm (0.016 to 0.024 in) and that has an outer diameter not exceeding 0.9 mm (0.035 in).

用来产生测试火焰的灯上应有一根35 mm (1.38 in)长的管子，上有一直径为孔0.4 至 0.6 mm (0.016 至 0.024 in)的孔，外径不能超过0.9 mm (0.035 in)。

They aretched through a SCR that is rated at 300A 1200V, and pulsed into a 7-turn flat solenoid that propels the same 3mm thick 13cm outer dia, 4cm inner dia 70gram disk as on the experiment aboven.

通过一个1200V/300A的SCR连接到一个7匝的线圈推动一个较小的厚3mm外径13cm内径4cm重70g和上面的试验类似的铝盘。

This invention relates to a slider (11) for an optical data writing/reading apparatus (1), the slider carrying an optical lens (40) defining a focal point (42), the slider having a configuration such that, upon variation of the disk speed such as, for example, caused by a slider movement from an inner diameter to an outer diameter, the pitch angle varies owing to a pivot movement about a pivot axis which lies in a vertical plane through the focal point, the pivot axis preferably coinciding with the focal point.

本发明涉及用于光学数据写/读装置(1)的滑动器(11)，在该滑动器(11)上装有确定焦点(42)的光学透镜(40)，该滑动器具有这样一种结构，以便于在诸如滑动器从内径到外径运动造成盘速变化时，由于围绕位于经过焦点的垂直平面内的旋转轴的枢轴运动而改变倾斜角。

In view of the fact that products cann't meet design demands when processing products with arc generatrix shape in centerless grinding, the design of copy rule was introduced,calculating formula was also presented.

针对用无心磨削的方法加工凸圆弧型外径素线的产品时存在的产品与设计不符的现象，重点论述了仿形尺的设计，给出了计算公式。

A few days ago, an external diameter amounts to 4.476 meters goalpost to mix Luoyang of classics of rotary table bearing to examine certificate of proof sends quarantine bureau bank of consummate big talk, await fate toward India.

日前，一套外径达4.476米的球柱混合转盘轴承经洛阳检验检疫局检验合格发至上海口岸，等待运往印度。

D. of the precise, thin, long and straight cylindrical workpiece by use of the hyperboloid guide roller pair is discussed.

讨论采用双曲面导辊副对精密细长直圆柱工件外径进行贯穿式超精研的工艺方法。

With given circumradius R and inradius r,two fundamental inequalities related to the lower bound of the area A and perimeter p of a convex set K are obtained.

在给定平面凸集K的外径R和内径r的条件下，得到了关于凸集的面积A和周长p的下界的一组不等式，并且证明了当凸集K为双帽体时不等式取得等号。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。