有管的

Results: In the period of 1993-2000, there were 1 264 neural tube defects among 1 189 126 total births in 30 counties/cities in China. The overall neural tube defects rate was 10.63 per 10 000 births, and rates were higher (18.99 per 10 000 births) in the year 1993, lower (6.05 per 10 000 births) in 1998. The prevalence rates of anencephaly, spina bifida and encephalocele were 4.71 , 4.39 and 1.53 per 10 000 births respectively.

结果 ：在 1 993～ 2 0 0 0年间，共监测到 1 1 891 2 6个活产儿和死胎、死产儿出生，其中有明确诊断的神经管畸形儿 1 2 6 4例；总出生人群中的神经管畸形率为 1 0 。6 3/ 1 0 0 0 0 ，1 993年的畸形率最高( 1 8.99/ 1 0 0 0 0 )，1 998年最低( 6 。0 5/ 1 0 0 0 0 )；无脑儿、脊柱裂和脑膨出在每 1 0 0 0 0个出生儿中的患病率分别为 4 。71、4 。39和 1 。53。

The overall neural tube defects rate was 10.63 per 10000 births, and rates were higher (18.99 per 10 000 births) in the year 1993, lower (6.05 per 10 000 births) in 1998. The prevalence rates of anencephaly, spina bifida and encephalocele were 4.71,4.39 and 1.53 per 10 000 births respectively.

结果：在1993～2000年间，共监测到1 189 126个活产儿和死胎、死产儿出生，其中有明确诊断的神经管畸形儿1 264例；总出生人群中的神经管畸形率为10.63/10 000，1993年的畸形率最高(18.99/10 000)， 1998年最低(6.05/10 000)；无脑儿、脊柱裂和脑膨出在每10 000个出生儿中的患病率分别为4.71、4.39和1.53。

The tubes' buddle of the traditional heat exchangers is composed of tubes with same diameter, which influences its efficiency at small Reynolds number because of the big fluctuation of the heat transfer coefficient led by the flux fluctuation.

传统的换热器都是采用同径管组成换热管束，因而，在流量波动的工况下，管程传热系数波动较大，对换热器的正常运行有影响。

According to experts, cold-finished seamless pipe Tsunehiro There are two ways: one is hard-drawn method is to pipe by pulling drawing die, so steel tapered, elongated; the other way is to cold-rolling method, which is Meng Mannesmann brothers invented the hot-rolling mill used in the cold in the method.

据恒博无缝管专家介绍冷加工有两种方法：一种是冷拔法，就是将钢管通过拔管模拉拔，使钢管逐渐变细、伸长；另一种方法是冷轧法，它是将孟内斯曼兄弟发明的热轧机应用于冷加工中的方法。

Tensioner system is a key attachment of pipe laying barge. Its dynamic behaviors directly influence the offshore pipe laying operations. But the dynamic research about tensioner is very rare.

张紧器系统是与铺管船配套的关键设备，其动态行为直接影响整个海上铺管作业，但是有关张紧器系统的动态研究却很少。

Beijing Fengyuan machinery of the limited liability company's products are: rectangular, round-the wind of automated production lines, plasma cutting machine, a total of flange plate machine, plug-flange machine, bite Machine, Flap machine, leveling pressure tendons machines, electric cutting plate machine, riveting machine, the machine Chongjian, vol Jiaotie round machine, coiling machine; and Germany TRUMPF sheet metal electrical tools open Liu shear, infantry Chongjian, the groove machine, the panel saw, etc.

北京力丰源机械有限责任公司生产的产品有：矩形、圆形多功能风管自动生产线、等离子切割机、共板法兰成型机、插接式法兰成型机、咬口机、折边机，调平压筋机、电动剪板机、铆接机、联合冲剪机、角铁卷圆机、卷板机；并且是德国TRUMPF钣金电动工具（开料剪、步冲剪、坡口机、库板锯等）、瑞士TOMREC圆风管生产线、奥地利FORSTNER多功能钣金自动开料生产线在中国的总代理。

The checking-tools for bended pipe is an important tool which tests bended pipe rapidly and measuring its error. The designing of it is even more important because it is different from distinct bended pipe.

弯管检具作为快速准确检测弯管产品合格性和误差的工具，由于有很强的专用性，其设计尤为重要。

Dongguan Jian Qiao Equipment Co., Ltd was established for many years, located in Guangdong Province Tangxia Tangxia Town, Dongguan City Industrial Zone on the 30th the first company has been engaged in the electronic testing equipment, environmental test equipment sales services and the development of automatic test system, the main product has : testing machine, furniture testing machine, swing machine, optical quality control testing instruments, wire tester, wear-resistant machine, constant temperature and humidity machine, optical image measuring instrument, wire testing machine, office chair repeated impact test machine, a desk drawer repeated testing machine, office chair backrest repeated testing machine, office chairs rotary life testing machine, officelife test machine, plug line hoist swing test, MIT-style folding strength testing machine, tensile testing machine, micro-computers, paper tube compression testing machine, aging test machine, testing machine decolorization extent, resistant to rubbing tester, testing machine embrittlement, sudden pull test machine, testing machine, such as bonding strength.

东莞市剑乔仪器设备有限公司创建多年，位于广东省东莞市塘厦镇塘厦第一工业区30号公司一直从事电子测试仪器、环境试验设备的销售服务和自动测试系统的开发，主要产品有：试验机，家具试验机，摇摆试验机，光学品管检测仪器，线材测试仪，耐磨机，恒温恒湿机，光学影像测量仪，线材试验机，办公椅反复冲击试验机，办公桌抽屉反复试验机，办公椅反复靠背试验机，，办公椅旋转寿命试验机，办公椅脚寿命试验机，插头线吊重摆动试验，MIT式耐折强度试验机，微电脑拉力试验机，纸管抗压试验机，老化试验机，脱色程度试验机，耐揉试验机，脆化试验机，突拉试验机，胶合强度试验机等。

All men have a lumpy tubular structure on the back of the testicle called the epididymis and a small firm tube which passes from the testicle into the groin called the vas deferens.

所有男性有结节管状结构对后面的睾丸，称为附睾和一个小公司管，其中通过从睾丸进入腹股沟所谓的输精管。

The major clinical manifestations of the anastomotic leakage include intermittent or persistent fever, paralytic ileus and discharge of faecal material in the drainage tube.

间歇性或持续性发热、麻痹性肠梗阻、引流管中有粪质样液体是吻合口漏的主要表现，经引流管局部冲洗引流辅以TPN和横结肠失功性造漏是治疗吻合口漏的主要方法。

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。