双管的

On the other hand, the linear deviations of the active voltage biasing circuit with Bipolar Transistor or FET were at most 7%, and at most 3% respectively.

结果：在阳极电流为50 μA，电阻型光电倍增管偏置电路的线*偏离度已达40%，而用双极*晶体管或场效应晶体管的有源偏置电路的线*偏离度分别为≤7%，≤3%。

Here's a list of bird species you just might see: Red Throat Loon Common Loon Pied-billed Grebe Horned Grebe Red-necked Grebe Great Cormorant Double-crested Cormorant American Bittern Least Bittern Glossy Ibi s Black-bellied Plover American Golden-Plover Semipalmated Plover Killdeer Pomarine Jaeger Parasitic Jaeger Dovekie Common Murre Thick-billed Murre Osprey Bald Eagle Northern Harrier Sharp-shinned Hawk Cooper's Hawk Northern Goshawk Red-shouldered Hawk Broad-winged Hawk Red-tailed Hawk Rough-legged Hawk Golden Eagle American Kestrel Merlin Peregrine Falcon Gyrfalcon Common Nighthawk Whip-poor-will Red-breasted Nuthatch White-breasted Nuthatch Bohemian Waxwing Cedar Waxwing Solitary Vireo Warbling Vireo Philadelphia Vir eo This list is a very small sample of the species you will find at Acadia.

这里的鸟类名单你也许见：红喉插管常见回路鹡-帐单墶角墶红颈鸬墶大双美洲凤头鸬盐卤盐卤最漂亮性IBI收盘黑腹宝美国黄金船船killdeersemipalmatedpomarineJaeger寄生Jaegerdovekie共同murre厚帐单murre鹗秃鹰北方鹞清脆逃家鹰库珀的北方苍鹰鹰红鹰担负广翅鹰红尾鹰粗腿美洲红隼鹰雕盈富勤猎隼共同夜鹰鞭穷人都红胸鸟白胸鸟喙雪松喙波西米亚孤vireo唱歌vireo费城录像雇佣这个名单是一个很小的样本，你会发现在

Learning from double metal complex structure and multilayer over high-pressure container,double layer SAW with large diameter was designed,this will enhance pipe holding pressure capacity,so it can improve pipe transmission capacity.

受双金属复合管结构和多层超高压容器的启示，设计了一种大直径双层埋弧焊管，拟从结构上提高钢管的承压能力，从而提高管道的输送能力。

Products not only applicable to high-volume small-diameter double-ended lead metal tubular components of civilian production, and it applies to large-diameter pipe production of industrial electric heating.

产品不单止适用大批量小管径的双端引线的民用金属管状元件生产，而且适用大管径的工业电热管生产。

BLOOM:(In an oatmeal sporting suit, a sprig of woodbine in the lapel, tony buff shirt, shepherd's plaid Saint Andrew's cross scarftie, white spats, fawn dustcoat on his arm, tawny red brogues, fieldglasses in bandolier and a grey billycock hat) Do you remember a long long time, years and years ago, just after Milly, Marionette we called her, was weaned when we all went together to Fairyhouse races, was it?

173布卢姆：（身穿燕麦色运动服，翻领上插着一小枝忍冬草，里面是时髦的浅黄色衬衫，系着印有圣安德鲁十字架的黑白方格花呢领带。白色鞋罩，臂上挎了件鹿毛色风衣，脚蹬赤褐色生皮翻毛皮鞋。将一架双筒望远镜像子弹带那样斜挎在肩上，头戴一顶灰色宽边低顶的毡帽。）你还记得吗，很久很久，多年以前，米莉——我们管她叫玛莉奥内特。刚断奶，我们大家曾一道去看过仙女房赛马会？

A clearly defined endodermis is seen in all roots and in the stems of the non seed-bearing vascular plants and some dicotyledons.

所有不产生种子的维管植物和一些双子叶植物的茎中都可以清楚的显示出这一结构。

Epicalyx segments deltate, abaxially keeled, slightly incurved in bud; branchlets and panicles densely gray puberulous; floral tubes 6- or 7-ribbed; ribs rounded or obscure.

在芽中的副萼片三角形，背面具脊，稍弯曲；浓密的小枝和圆锥花序灰色被微柔毛；花被管6-或7肋；棱圆形的或不明显。 6 L。 venusta 西双紫薇

A backscatter fiber is used to expand the width of laser pulse. A locking filter is added to dual F-P etalon. Photo Multiplier Tube is used to detect the intensity of light and a frequency tracking circuitry is designed.

使用散射光纤对激光脉宽进行扩展，在双通道标准具的基础上增加专用于频率跟踪的通道，使用光电倍增管检测光强，设计制作了基于采样的频率跟踪电路。

Eustele The STELE arrangement found in most gymnosperms and dicotyledons in which the vascular tissue is arranged into a ring of discrete bundles separated by medullary rays, all contained within a single ring of endodermis and pericycle.

真中柱：发现于大多数裸子植物和双子叶植物的中柱类型，其维管组织由不连续的，被髓射线分开维管束排列成环状。所有的微观组织都包含在内皮层和中柱鞘以内。

Results Trunk neural crest stem cells were successfully isolated and cultured. The immuocytochemcal result showed that the cells were nestin-and P75-positive. Trunk neural crest stem cells grew through adhering to chitosan fiber after inoculation. Under an electon microscope, the spindle-shaped trunk neural crest stem cells were proliferated and migrated along the fiber. The cells arranged side by side or linked by heads and tails in processes. The ends of S-100 positive cells were flat and expanded, adhering to the fiber as claw-shaped pseudopodium.

结果 采用神经管植块法培养的神经嵴干细胞，免疫细胞化学染色呈现nestin及P75双阳性，将其接种在壳聚糖纤维支架材料上，可见神经嵴干细胞贴附于壳聚糖纤维上生长；S-100免疫细胞化学染色显示，S-100阳性细胞突起的末端呈扁平状膨大；扫描电镜显示，壳聚糖纤维上的躯干神经嵴干细胞为梭形，呈现"端对端"、"肩并肩"排列，伸出爪形伪足贴附于壳聚糖纤维上。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐