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This invention discloses a new technology for preparing rear earth ionic doped fiber prefabricated rods with DC-RTA technology in a sol-gel method including preparing sol containing necessary doped ions, coating said sol uniformly on the inner wall of the quartz glass tube and burning it under high temperature to coagulate and vitrify them to a doped layer and repeating the above process to form a fiber prefabricated rod by oxygen and hydrogen flame after the doped layer reaches to a designed thickness and the fiber prefabricated rod can be made to various rare earth ionic doped fibers by an ordinary drawbench technology.

本发明属于光纤制造和光纤激光技术领域，具体公开了一种利用溶胶凝胶方法中的DC-RTA技术制备稀土离子掺杂光纤预制棒的新工艺。该工艺步骤包括预先配制好含有所需掺杂离子的溶胶，将该溶胶均匀涂覆在石英玻璃管的内壁后高温灼烧，使之凝结并玻璃化为一层掺杂层。反复上述涂覆灼烧过程，在掺杂层达到设计厚度后由氢氧焰高温收棒形成光纤预制棒。该方法所得到的光纤预制棒可以通过普通拉丝工艺拉制成各类稀土离子掺杂光纤。

In everyone's life, at some time, our inner fire goes out.It is then burst into flame by an encounter with another human being.

在每个人的一生中，某个时候，心中的火花会爆发，因为碰见另一个人而燃起熊熊火焰。

The automobile half-shaft busing with direct forged inner hole has high strength and long service life .

直接锻造出内孔的汽车半轴套管强度高，寿命长，锻造工艺复杂。

Following the May 21 Group Dalian Airport Joint Heilongjiang, Jilin, Inner Mongolia, Tianjin, Hebei, Shandong provinces and autonomous regions 6 Airport Group and Yantai, Weihai, Linyi, Weifang City Airport 4 Airport composed of a total of 27 north-east and the hinterland Bohai Rim regional aviation market-related strategic alliances airport yesterday, the official launch of the League of Dalian airport passenger transit between the airport business, airport passengers in the Union by the Dalian airport to other airports, you can "mess transit, baggage white, one vote in the end , seamless butt."

继5月21日大连机场集团公司联合黑龙江、吉林、内蒙古、天津、河北、山东6个省市自治区的机场集团公司及烟台、威海、临沂、潍坊4城市机场共计27家机场组成东北腹地及环渤海区域相关机场航空市场战略联盟，昨日起，大连机场正式开展联盟机场间旅客中转业务，旅客在联盟内机场经大连机场中转至其他机场，可以"通程中转，行李直挂，一票到底，无缝对接"。

The temperature in tunnels of butterfly orchid can be controlled between 15～28 ℃.The greenhouse inner humidit...

温室中加小拱棚，可以在同一温室中创造出不同的局部小气候，满足不同花卉的生长需要。

St. Louis-based Solutia is touting the opportunity to use its polyvinyl butyral film inner layer with enhanced acoustic performance to shave a few millimeters of glass from windshields, which will cut about 5 pounds in weight off the average car, Leroux said.

总部位于圣路易斯的Solutia是招徕机会利用其聚乙烯醇缩丁醛薄膜内层增强声学性能的刮脸几毫米的玻璃从挡风玻璃，其中将裁员约5磅的体重从平均车，勒鲁说。

The emergence of butyrate seems to have changed their future, but they sparkle in their eyes,have also expressed their inner expectations.

基丁的出现，似乎改变了他们的未来，但他们眼中闪耀的光芒，又表明了他们内心的期盼。

The benchers of the Inner Temple will tell you that Robert Audley is troubled with none of the epidemics whose outward signs are turn-down collars and Byronic neckties.

内殿法学协会的主管委员会告诉你：罗伯特一点也没感染到流行性疾病，这种疾病的外部症状就是领子翻下来，戴着拜伦式的领结。

The stator inner diameter of Powerformer is calculated according to the bend radius of cable and the slot shape is determined by the outer diameter of cable, a rated voltage 35kV and rated power 2550kW Powerformer is designed on the basis of this design method.

即根据电缆的弯曲半径计算电机的定子内径，由电缆的外径确定电机的定子槽形，在此基础之上设计了一台容量2550kW，额定电压35kV 的Powerformer。

The bending radius during installation: For non-armored digital signal cable for railway with plastic sheath, composite sheath and Al sheath, the bending radius is not less than 10 times of outer diameter of cable; For armored cable, the bending radius is not less than 15 times of its outer diameter; For railway inner digital signal cable, the bending radius is not less than 20 times of its outer diameter.

2.4敷设时的弯曲半径：塑料护套、综合护套、铝护套铁路数字信号电缆非铠装电缆应不小于电缆外径的10倍；铠装电缆应不小于电缆外径的15倍；内屏蔽铁路数字信号电缆应不小于电缆外径的20倍

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％。