导管

Comparatively one of the three options is the most effective, in which it uses a fixed distributer and a valve guide as the anchor point to restrict rocker-bridge to wiggle.

三种改进方案各有优缺点，但综合比较后确定了一种改进方案，即利用一个固定导向柱和一个气门导管为定位点，限制横桥左右摆动。

The liquid transport takes place in each downcomer through a plurality of discharge apertures (32) onto a loaded tray.

在每个下导管中液体穿过多个排放孔(32)输送到载荷板。

The bigger top tension will cause the wellhead to be over-pulled and increase the probability of wellhead collapse. As the mean drifting of drilling vessel or platform increases, the wellhead displacement and bending moment nearly linear enlarges. The greater current velocity may result in wellhead instability because of its limited bearing moment capacity. Therefore the drifting control is very important to subsea wellhead stability. The wellhead stability may be improved by taking measures such as enhancing the conductor bending strength, controlling scour depth on seabed, getting geological data sampling of shallow formations.

算例分析表明，水下井口的横向偏移及弯矩随张力比和海流流速的增加而大幅增大，顶张力过大会引起井口稳定性变差；随着钻井船或平台漂移量的增加，井口的横向偏移和弯矩近似线性增加，控制好钻井船或平台的漂移非常重要；由于井口承受弯矩的能力有限，较大海流流速情况下可能造成井口失稳；提高导管抗弯强度、控制泥线处管柱冲刷、获取浅部地层的取样数据等措施可以增强井口稳定性。

Objective To explore the significance of Id-1、P53 expression in invasive ducal cancer.

目的 探讨Id-1、P53在乳腺浸润性导管癌中的表达及其意义。

Objective To explore the diagnosis and treatment of parotid gland duct injury.

目的 通过临床资料的分析，探讨腮腺导管损伤的诊断方法和治疗原则。

These indicated that duct cells of salivary gland could produce NGF, and were an important source of human NGF.

表明人涎腺的导管细胞可以产生NGF，是人体NGF的重要来源之一。

Objective To study the mechanisms of the expression of exogenous gene injected via the mammary duct in rat mammary gland tissue.

目的 研究外源性基因经乳腺导管注射在乳腺组织中表达的机制。

The findings were consistent with a salivary duct carcinoma of the parotid gland and were confirmed by the histologic report.

结论一致性的认为是腮腺的涎腺导管癌，该结论经组织学报告证实。

Salivary duct carcinoma of the parotid gland: report of a rare case with a comparative study of aspiration cytology and histomorphology.

腮腺的涎腺导管癌：少见病例的抽吸细胞学和组织学对照病例报道。

Gland cell and duct epithelium of lacrimal gland.

泪腺腺细胞及导管上皮。

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。