双线的

In this paper we combining connecting tunnel project of Subway Line 4 at Xidan-lingjing bystreet in Beijing. To aim at the difficulties of building large-span connecting tunnels in the fine sand layer, through roads and underground pipelines, construction nearby buildings and other project difficulties. Using theoretical analysis, numerical simulation, field tests and other research methods to comprehensive and systemic research the stratum deformation mechanism and process control techniques of shallow excavation method, and a series of results were obtained. Firstly, use the stochastic media theory to analyze the stratum deformation mechanism, concretely analyze the analytic equation of surface horizontal displacement and deformation which were caused by the excavation of single-hole and double-hole tunnel, and further discussion on ground settlement, vertical deformation, surface horizontal displacement and horizontal deformation. Analyzing the main influence factors of surface displacement, and combined with practical work to proof the theory which was applied to shallow buried single-hole tunnel in fine sand layer was scientific.

本文结合北京地铁四号线西单～灵境胡同渡线隧道工程，针对在粉细砂地层中修建大跨渡线隧道，下穿道路和地下管线，临近建筑物施工等工程难点，利用理论分析、数值模拟、和现场监测等多种研究手段，对浅埋暗挖隧道地层变位机理及控制技术，深入地进行全面和系统的研究，并取得以下成果：(1)引入随机介质理论，对地层变位机理进行了分析，具体分析了单、双孔隧道开挖引起的地表位移及变形的解析方程，并深入探讨了地表沉降、垂直变形、地表水平位移和水平变形的特点，同时分析了影响地表位移的主要因素，并结合工程实例，佐证该理论应用于粉细砂地层浅埋暗挖单孔地铁隧道的科学性。

Securityüa wide range of features to compare the well-knownüthere is:"even like Kam","even like Jin D.","Ya Wang","Date quarter-wave","cut line","double down","put over","flat sheath","Mongolia knife","Kazakhstan knife,""fish knife," and so on.

保安腰刀种类繁多，各具特色，比较著名的腰刀有："什样锦"、"什样锦双刀"、"雅王其"、"波日季"、"一刀线"、"双落"、"满把"、"扁鞘"、"蒙古刀"、"哈萨克刀"、"鱼刀"等等。

The influence of injection conditions on the electron trajectory is discussed.As special cases of the present analysis,bi- filar a...

作为特例分析了双螺旋线及四螺旋线静电焦系统，并给出了相应的普适计算曲线。

At present, the company produced varieties of major equipment has dual drawing fancy twisting machine, four-color gilling machine, small crochet needle, multifunction fancy spinning machine, the flower twist roller machine, three roller machine flower twist , pilling machine, charge-ray machine.

目前公司所生产的主要设备品种有双牵伸花式捻线机，四色针梳机，小针筒钩编机，多功能花式纺纱机，二罗拉花捻机，三罗拉花捻机，起毛机，押线机等。

For double-circuit transmission Lines, when one of the two from its internal faults ,under mutual inducing influence, pilot protective Relaying of the sound line may lead maloperation.

平行双回线中一回线路出现内部故障，由于两回线互感的影响，非故障线路纵联保护，可能会误动。

Important developments show that plant expression of a dsRNA targeting a nematode gene can successfully induce silencing in parasitizing nematodes.

研究进展表明，植物双链RNA表达靶定的线虫基因能够成功地诱导线虫基因沉默。

Whether decorative seams or inserting zippers or velcro tape up to topstitching of closing seams - the lockstitsch machine 767-FAS-473-RAP-HP offers best conditions for all twin-needle operations on plain cut pieces.

无论是装饰线缝或是嵌入拉链或尼龙搭扣衬条，还是在拼缝上压明线- 767-FAS-473-RAP-HP锁式线迹缝纫机均为在大面积缝片上进行双针操作提供了最好的条件。

BOLT BK/CP ARTEK BRAKE CABLE 2P GRAY ARTEK SHIFTER LEVER NIL SHIFTER CABLE NIL PEDAL YH-31X 9/16", W/BALL , W/REFLECTOR PLASTIC BK CHINA SADDLE 7664 BLACK, CP RAIL AND CLAMP BK CHINA SEAT POST SP-200 250L, W/ SAFE LINE STEEL CP OM REFLECTOR REAR : RED J84 WHEEL: WHITE J91*2PCS CHINA CHAINWHEEL STEL ,1/2"*1/8"*32T*165MM, SQUARE HOLE, W/O CHAIN COVER STEEL CP CHINA CRANK 165L STEEL CP CHINA CHAIN COVER 660-2104 SUIT TO 32T STEEL PAINTED CHINA CHAIN C410 1/2"*1/8 STEEL BROWN KMC DERA.

螺栓银行/处长阿尔刹车线双路灰色阿尔移杠杆无移线无踏板的YH - 31X 9月16日&，瓦/球，瓦/反射银行中国塑料鞍7664黑色，处长铁路和夹具银行中国座椅后警司- 200 250L宽/安全线钢处长唵反射后置：红J84轮：白色J91 * 2PCS中国链限值， 1 / 2 &* 1 / 8 &* 32T * 165MM ，方孔， W / O型链罩钢处长中国曲柄165L钢处长中国链罩660-2104适合32T钢彩绘瓷器链C410 1 / 2 &* 1 / 8 钢棕KMC 防务。

Cycloid gear in the large-type cycloid pin -wheel reducer, even load of shaft pins after rational

本文对大型摆线减速器双组摆线轮的合理布置的条件、理布置后所得到的柱销均载和大型摆线减速器承栽能力的提高等进行了论述和证明。

DC motor complex large-scale three-phase power transformer deep-trough three-phase asynchronous motor DC motor DC motor single-phase squirrel-cage induction motor.Three-phase commutator motors, single-phase motor power sub-phase squirrel-cage three-phase asynchronous electric double mine explosion-proof motor with squirrel-cage three-phase asynchronous motor rotor cup AC servo motor drives three-phase asynchronous motor principle of rotating magnetic field Generation and transmission of three-phase induction motor winding three-phase stepper motor 165mm Three-phase three-phase synchronous motor stepping motor JFB power generator rotor rectifier type AC synchronous motor DC servo motor three-phase current rotating magnetic field of teaching instrument Wound Three-phase alternator motor 160 rats of three-phase permanent magnet generator cage induction motor Synchro Motor medium-sized three-phase power transformer

直流复励电动机大型三相电力变压器三相异步深槽式电动机直流电动机直流电机单相异步鼠笼式电动机三相整流子电动机单相电动机电源分相器三相异步双槽鼠笼电机矿用防爆电动机三相异步鼠笼式电动机杯形转子交流伺服电动机三相异步电动机调速原理旋转磁场的产生与变速三相绕线式异步电动机 165mm三相步进电机三相同步电动机 JFB型硅整流发电机转子供电交流同步电机直流伺服电动机三相电流旋转磁场示教仪绕线式电动机三相交流发电机 160型永磁发电机三相鼠笼异步电动机自整角电机中型三相电力变压器

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。