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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。

Using laser Doppler effect , based on measurement of the rotate speed of single section , the speed difference of double sections is measured and integrated , then the torsion angle of rotating shaft on torque effect is got. The non2contact torque measurement is realized , and dynamic monitoring of rotary machine equipment is achieved.

利用激光多普勒效应，在单截面测量转轴转速的基础上，采用双截面测量转速差并积分得到转轴在扭矩作用下的扭转角，实现扭矩非接触测量，达到回转机械设备的动力监测的目的。

The "se" in any society has a double-faced trait that is ,the sociality and the animality.

这种选择即使色获得进入主流话语的合法性，又使色的解放陷入一种尴尬的境地：正如老狼文中提到，色是伴随着性而展开的，任何社会中的色都有其社会性和生物性。

After inducing 1%～16% of the aniseikonia, there is no significant difference between double-screen ATBC and theoretical results. It illustrates that ATBC can reflect the ratio of the image size of the subjects'eyes successfully and it can be applied to clinical examinations as well as experimental studies.

人工诱导屈光参差后，双屏显示计算机不等像检查结果和理论计算值的差异无显著性，两者有很好的相关性，说明该检查能够准确的反映被检者双眼影像的大小，可以用于临床检查及实验研究。

In this thesis, a convenient and efficient synthesis of highly functionalizeddihydropyrido[2,3-d]pyrimidines via a double [5 + 1] annulation strategy startingfrom easily available α-alkenoyl-α-carbamoyl ketene--acetals 1 and cheapreagents (NH4OAc, DMF, and POCl3) has been developed.

本论文探索了一种简便有效的合成高度官能化的二氢吡啶并[2，3-d]嘧啶的方法，此方法由易得的α-乙酰基-α-氨基乙酰基二硫缩烯酮1和便宜的试剂(醋酸铵，二甲基甲酰胺和三氯氧磷)通过两步[5 + 1]加成而实现。

THE FIRST TOTAL SYNTHESIS OF TAXAMAIRIN B Taxamairin B, representive of rare naturally-occuring rearrang-ed 9(10→20)-abeo-8, 11, 13-triene diterpenoids, has been firstsynthesized by a eleven-step route in an overall yield of 8.19%,starting from commercially available catechol and 1,3-cyclohexan-dione. The improved Friedel-Crafts annulation, thermodynamicallycontrolled-geminal pairing methylation, the selective oxidation ofallyl group and the selective reduction of the less-hindrancecarbon-carbon double bond are the key steps.

二。美丽红豆杉素B的全合成研究 1，美丽红豆杉素B的首次全合成以价廉，易得的邻苯二酚和1，3-环己二酮为原料，经过改良的Friedel-Crafts烷基化反应，热力学控制的α，β-不饱和酮结构的α一位双烷基化，烯丙位的选择性氧化，以及选择性还原位阻较小的碳碳双键等十一步反应，以8.19％的总收率首次完成了美丽红豆杉素B的全合成。

The tunable photon broad band radio frequency phaser based on a silicon ring resonance cavity comprises a pumping signal light-generating system, a carrier wave light-restraining double-sideband generating system, a silicon ring resonance system and a measuring system; wherein, the silicon ring resonance system comprises a light coupling device and the silicon ring resonance cavity; the output of the light coupling device is connected with the input port of the silicon ring resonance cavity; wherein, the silicon ring resonance cavity is composed of a silicon annulet and a root of a straight waveguide; the air gap distance between the silicon annulet and the root of the straight waveguide is several ten nanometers or several hundred nanometers; the taking characteristic of the silicon ring resonance cavity is the characteristic of a seasonal reject trap; the transmission rate in the position of a resonance wavelength is equal to zero or is very close to zero.

本发明包括：泵浦信号光发生系统、载波抑制光双边带产生系统，硅基环形谐振腔系统，以及测量系统。所述硅基环形谐振腔系统包括一个光耦合器和一个硅基环形谐振腔，光耦合器的输出连接到硅基环形谐振腔的输入端口，其中：硅基环形谐振腔由一个硅基微环和一根直波导构成，硅基微环和一根直波导之间的空气隙间隔为几十至几百纳米，硅基环形谐振腔频谱特征是周期性的带阻滤波特性，在谐振波长处的透射率等于0或非常接近0。

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。