查询词典 double-headed

On the basis of the probe and research into space analytic geometry and seeing from the students ' thinking characteristics , this paper has got a proof about three vector double vector product theorem .

本文通过对空间解析几何的研究和探讨，从学生的思维特点出发，给出一个有利于学生认知结构形成的三矢量的双重矢性积定理的证明

The double eyelid anaplasty with middle incision is a simple and effective method.Key words: doubling eyelid operation; incision method; middle incision

中段切口切开法重睑术是一种简便有效的方法，创伤小、恢复快，适合于不需要去除上睑皮肤的重睑成形术。

With the help of nonlinear finite element software ADINA, the distribution pattern and magnitude of back earth pressure of the anchor slab retaining wall with double layered anchor plate with various material parameters were analyzed, and the factors

摘要应用ADINA非线性有限元软件分析各种材料参数下，两层锚定板挡墙在重力荷载作用下的墙背土压力的分布规律及大小，探讨了影响土压力的因素。

Double Anchor Rod Pumps This pump is designed to be used in large anchor force oil well.

双卡杆式抽油泵适用于要求锚定力大的油井。

A flow injection spectrophotometry is proposed for simultaneous determination of iron ion andiron ion(Ⅲ based on o-phenanthroline spectrophotometry,using double zone injection and a reduction column packed with cadmium plated zinc power.

将流动注射技术引入邻菲罗啉分光光度法测定Fe2+分析体系，采用单阀双带镀镉锌片还原柱带隔离的阀体流路，建立了同时测定微量Fe2+和Fe3+的分析方法。

Instead of 5-2 to Andreev with a double minibreak, it was a replayed point, which Nalbandian won.

这一分必须重打，而原本Andreev是可以再次打破发球分以5-2领先的。

Our company besides produces the above standard throttling gear, but also produces the present domestic ordinary application each kind of special throttle, like wing anemography installment, ring-like throttle type flowmeter, double repeated passage hamlet anemography installment, 1/4 round spray nozzle, segment of orifice, dual orifices, Inner Tibet orifice, fast tube Flow sensor, jack-in low damaged due to pressing flowmeter, against wall wind pressure thief and so on 30 many kinds of varieties, 1000 many kinds of specifications, caliber from DN10-3000mm, pressure from PN0.01-32MPa, temperature from negative 260℃- 550℃.

我公司除生产上述标准节流装置外，还生产目前国内普通应用的各种特殊的节流件，如机翼型测风装置、环状节流式流量计、双重文丘里测风装置、1/4圆喷嘴、圆缺孔板、双重孔板、内藏孔板、均速管流量传感器、插入式低压损流量计、防墙风压取样器等30多种品种，1000多种规格，管径从DN10-3000mm，压力从PN0.01-32MPa，温度从负260℃-正550℃。

Manholes for engine room double bottom tanks to be mounted on angle bar coaming, 200 mm high, all other manholes to be fixed on doublings or to be flush with deck in way of passageways.

机舱双层底舱的人孔应安装有角钢制的围板，高度为200mm，所有其它的人孔应安装在双层底或通道处并与甲板平齐。

X-ray diffraction is one of the most common and efficient ways to measure a superlattice structure. This dissertation displays the detail results for characterization of Ge〓Si〓/Si superlattices by x-ray diffraction (including x-ray small angle diffraction and double crystal diffraction). It was found, when the growth temperature is lower, the intensities of xray small angle diffraction peaks are modulated by a periodical function, which indicates that both sets of interfaces of the superlattice is highly flat; when the growth temperature is higher, the diffraction peak intensities are simply decay with the increase of diffraction vector, which indicates that one set of interfaces is highly flat but another is not; when the growth temperature is very high, the diffraction peaks are reduced more rapidly, which indicates that both sets of interfaces are not ideal.

本文详细介绍了用X-射线衍射（包括X-射线小角衍射和双晶衍射）方法对Ge〓Si〓/Si超晶格结构特性测试的结果，尤其是发现，当Ge〓Si〓/Si超晶格的生长温度较低时，X-射线小角衍射谱峰的强度随着衍射波矢的增加而周期性调制，表明超晶格的两套界面都十分平整；当生长温度较高时，Ge〓Si〓Si超晶格的X-射线小角衍射谱峰的强度随着衍射波矢呈简单的衰减变化，对应于超晶格内有一套界面不平整的情况；当生长温度进一步提高时，X-射线小角衍射峰明显减少，表明超晶格内两套界面都不理想。

The common method for obtaining the angle of the plane figure to projection plane is through the right-angled triangle method after getting the double-face projection of the plane figure on the basis of the conception of maximum oblique line.

求平面图形对投影面的倾角，通常需要知道平面图形的两面投影，利用最大斜度线的概念，通过直角三角形法求得。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。