全环

From Leontopodium nanum (collected from Zhang County, Gansu Province), 12 compounds were isolated, of which 9 compounds have been identified. Among them, a derivative of coumarin is new.

从采自甘肃漳县的矮火绒草全草的甲醇提取物中，采用同样方法共分离纯化得到12个化合物，鉴定了9个化合物的结构，其中有1个新化合物，命名为6，7-并二氧六环[2-（1-甲酯基-1-甲基）-甲烯基]-香豆素（1）。

This thesis is constituted by four parts: In the first part a summarization is given on the main total synthetic methods of isoflavones, for example, deoxybenzoin method which generally involves two steps wherein a phenol is reacted in the presence of a Lewis acid with phenylacetic acid to generate an intermediate deoxybenzoin which is then cyclized with a one carbon electrophile.

本论文主要工作包括四部分：第一章综述了近年来全合成异黄酮的主要方法：脱氧安息香法，是以多羟基苯酚与苯乙酸或苯乙腈在Lewis酸存在下，反应生成中间体脱氧安息香，然后再与亲电碳试剂进行关环反应生成异黄酮。

The state-of-the-art combination transformer recently developed by us, namely ZFS10-H combination transformer, has been provincially certified in 2000, inheriting the advantages of the American and European box transformers, with such structural features as being innovative , compact and unique, composed of wholly sealed power transformer, high-voltage ring net load switch, terminal load switch, backup fuse and inserted fuse, etc.

新型组合变压器——我公司新研制的ZFS10-H组合式变压器于2000年通过省级鉴定，该产品吸收了美式箱变和欧式箱变的技术优点，结构新颖、紧凑、独特、由全密封变压器、高压环网负荷开关、终端负荷开关，后备保护熔断器及插入式熔断器等组成。

DK77 HE Series electric spark digital controlling machine tool High Efficiency and fine quality Multi-technical breaking-through, six paten honored Low price, high quality All-closed loop control, automatic multi-cutting, automatic machinery precision error compensating and highly intellectual Highest precision≤0.008mm Highest smooth finish rate, Ra≤0.58um and reedless Great benefits: at Ra≤1.2um, the process speed could obtain 75mm2/min Highly integrated: clear circuit, strong stability, reliable and easy to fix Unique wire winding system employed, smooth running, noiseless and long useful life Industry controlled computer system, PLC logical control and functional module design materialize the low error rate

DK77□□HE系列高性能电火花数控线切割机床惊人的效率、优良的品质多项技术性的突破、集六项专利于一身慢走丝的效果、快走丝的价格全闭环控制、自动多次切割、自动补偿机械精度误差、智能化程度高最高精度≤0.008mm 最高光洁度Ra≤0.58um，表面无条纹高效益：在Ra≤1.2um时，加工速度75mm2/min 高集成化：电路清晰、稳定性高、安全可靠、维修方便采用独特的运丝系统，运行平稳、无噪声、寿命长采用工业控制计算机系统、PLC逻辑控制、功能模块化设计，使产品故障率大大降低。

This article carries on an application research about the full digital, reversibleness and double closed loop of DC motor system on the four-quadrant based on the ARM embedded system.

本文以ARM嵌入式系统为控制核心，针对四象限的全数字可逆双闭环直流调速系统进行设计研究。

AWG, OPGW Tension joints Repair sleeves Vibration dampers, Stockbridge type Vibration dampers, loop type Complete Suspension Assemblies, including electrical connection to tower body, dwg.

平行夹 次全切除，物品3.1 - 37 硬件及配件为EARTHWIRE类型7号6 AWG、光缆紧张的关节修理袖子阻尼减震器、Stockbridge类型阻尼减震器、环型完整的组件，包括电气连接悬浮体、dwg。，没有。

Finally, the construction of a tetracyclic core of the target molecule was achieved by oxidation of the furan ring and intramolecular Michael addition. The total synthesis of 8-demethyl-pallavicinin B will be completed after two or three more operations starting from a pivotal precursor.

在构建目标分子骨架结构的研究中，成功的运用过酸氧化呋喃环-分子内Michael加成策略构建了四环体系，再经过两到三步的转化即将可以完成8-去甲基-pallavicinin B的全合成。

Methods We determined the change of blood viscosity,platelet aggregation,haematocrit,thrombosis with drugs.

方法测定环扁桃酯高、低剂量组大鼠的全血粘度、血小板聚集率、红细胞压积、血栓湿重，并与正常对照组、阿司匹林组进行比较。

On the basis of that all frame offsets are given, a genetic algorithm is presented to optimize the object.

在建立全船肋骨型值的基础上，提出了改进的遗传算法来优化货舱区分段环焊缝位置方法。

Knitting yarn factory owns one of eight sets of four sets of ring and mule spinning equipment, the main production and export of "Hong Kong-yu" brand all-wool, chemical fiber and other blended and woolen yarn, with an annual output up to 1000 tons.

其中针织纱分厂拥有八台套环锭纺和四台套走锭纺设备，主要生产出口&港宇&牌全毛、混纺和化纤等各类粗纺毛纱，年产量达1000吨。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。