底缘

通过对标准门槽及窄缝门槽的体型研究，分别拟定了适合各自门槽的闸门底缘型式。

Finally , through the study of structural forms of standard gate slot and narrow slit gate slot , the appropriate gate bottom rim patterns are recommended for each type gate slot , respectively .

平面闸门底缘型式及选择

Selection of bottom edge of plain gates

船闸反向弧形阀门底缘体形优化试验

Experimental Study on Optimization of Bottom Shape of Reverse Tainter Valve in Lock Culvert

异型宽尾墩是将宽尾墩底缘与溢流堰面断开形成缺口的一种墩型。

The unusual shape broad tail pier is a pier with a notch between broad tail pier and overflow weir bottom .

底缘结构型式不仅影响到闸门的自振特性，而且对过闸水流流态也有较大的影响。

Bottom edge affect not only the vibration characteristics of the gate , and there is also a greater influence on the flow regime .

平面阀门不仅存在底缘空化，而且还存在门槽空化，因此在高水头船闸应用中受到较大限制。

There are hemline cavitation and little-door groove cavitation in the plane gates , so plane gates are used in the navigation locks of high water level less .

并以此为依据，提出有胸墙的溢流坝的堰顶上、下游及胸璃底缘的曲线型式和相应的计算公式。

On this basis , the curve shapes and the formulas of upstream crest and downstream crest and those under the breast wall of the spillway dam are presented .

从提高空化数的角度出发，研究了减免阀门底缘空化的措施，并比较了各种改善措施的优劣。

In order to increase working cavitation numbers , the measures for depressing valve lip cavitation are studied and both advantages and disadvantages of various improvement measures are compared . $

底板是设在绝缘壳体的底缘处，在其上对应于端子焊接处设有贯穿的端子插孔；

The bottom board is arranged at the bottom edge of the insulating shell , and terminal inserting holes penetrated are arranged on the bottom board corresponding to terminal welding points ;

结果表明，劲性骨架对混凝土底缘正应力影响较大，应在设计及施工监控实践中予以重视。

The result shows that the stiff skeleton has a obvious effect on the normal stress of the bottom concrete . This influence should be claimed attention in design and construction control .

根据闸门的工作性质，结合闸门设计的其它因素和工程实际，介绍了闸门底缘型式的选择。

In accordance with the working condition of gates , as well as the bottom edge types of bulkhead gate and emergency gate , the paper introduces how to choose the type of bottom edge of plain gate .

分析了影响阀门空穴的主要因素有：阀门及其底缘型式、阀门开启方式、阀门段廊道体型、阀门门楣缝隙体型、平面阀门门槽和通气情况等。

Some main factors affecting the valve cavitation are analysed , including the types of valve and its lip , valve opening pattern , shapes of the culvert just downstream from the valve and the top sealing slit , slots of slide valve , aeration condition et al .

前言：目的：探讨眶底和眶下缘骨折的手术进路。

Objective : To study the surgical approach to the orbital floor and infraorbital rim .

下颌前牙牙槽窝底距下颌骨下缘高度的观测

Observation on the vertical distance between alveoli fossa of mandible anterior teeth and lower margin of mandible

下穹窿结膜囊成形术方法：对15例眶底和眶下缘骨折采用经结膜切口进行治疗。

Method : 15 cases of fractures of the orbital floor and infraorbital rim were treated with the transconjunctival approach .

目的观测国人的下颌前牙牙槽窝底到下颌骨下缘垂直距离的数据。

Objective To study the vertical distance between alveoli fossa of mandible anterior teeth and lower margin of mandible in Chinese people .

胆囊底与肝下缘关系：缘上型43.8%，缘下型36.6%，平缘型19.2%。

The relationship between fundus of gallbladder and the free edge of liver ; above is 43.83 % , under is 36.6 % , at the same level is 19.2 % .