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Downstream from a lock or canal that is used to control the flow of water at the lower ''.

位于河流的下游用以控制下游的水流的一个闸门。

A gate downstream from a lock or canal that is used to control the flow of water at the lower end .

位于河流的下游用以控制下游的水流的一个闸门。

When entering the diaphragm pressure on the top of the control room to the atmosphere or water by the downstream area of low pressure, the role of the bottom plate in the valve and the pressure below the diaphragm on the pressure value is greater than the top, so the main valve disc to the fully open position; when entering the diaphragm pressure above the control room can not water the lower reaches of the atmosphere or area of low pressure, the role of the diaphragm on the top of the pressure value is greater than the pressure below the value, so will the main valve pressure valve set to fully closed position; when the diaphragm pressure above the value of the control room at the entrance of the middle pressure and outlet pressure, the main valve in the regulator valve on the disk, and its regulation depends on the location of the needle-catheter system and adjustable valve guide of the role of joint control.

当阀门进入隔膜上方控制室内的压力水被排到大气或下游低压区时,作用在阀盘底部和隔膜下方的压力值就大于上方的压力值,所以将主阀阀盘推到完全开启的位置;当进入隔膜上方控制室内的压力水不能排到大气或下游低压区时,作用在隔膜上方的压力值就大于下方的压力值,所以就会把主阀阀盘压到完全关闭的位置;当隔膜上方控制室内的压力值处于入口压力与出口压力中间时,主阀阀盘就处于调节状态,其调节位置取决于导管系统中的针阀和可调导阀的联合控制作用。

When entering the diaphragm pressure on the top of the control room to the atmosphere or water by the downstream area of low pressure, the role of the bottom plate in the valve and the pressure below the diaphragm on the pressure value is greater than the top, so the main valve disc to the fully open position; when entering the diaphragm pressure above the control room can not water the lower reaches of the atmosphere or area of low pressure, the role of the diaphragm on the top of the pressure value is greater than the pressure below the value, so will the main valve pressure valve set to fully closed position; when the diaphragm pressure above the value of the control room at the entrance of the middle pressure and outlet pressure, the main valve in the regulator valve on the disk, and its regulation depends on the location of the needle-catheter system and adjustable valve guide of the role of joint control.

当进入隔膜上方控制室内的压力水被排到大气或下游低压区时,作用在阀盘底部和隔膜下方的压力值就大于上方的压力值,所以将主阀阀盘推到完全开启的位置;当进入隔膜上方控制室内的压力水不能排到大气或下游低压区时,作用在隔膜上方的压力值就大于下方的压力值,所以就会把主阀阀盘压到完全关闭的位置;当隔膜上方控制室内的压力值处于入口压力与出口压力中间时,主阀阀盘就处于调节状态,其调节位置取决于导管系统中的针阀和可调导阀的联合控制作用。

It is indicated that the easily cavitated locations are at the top of orifice, the comer at downstream of orifice and the center of the backflow.

结果显示,容易发生空化的部位主要有三处:一是孔板顶缘处,二是孔板下游角隅处,三是孔板下游回流旋涡中心部位。

Luozha River is a first branch of Lancang River in its middle section. A less known deciduous monsoon forest was recently discovered on the dry-hot banks of Luozha River. The deciduous monsoon forest is 15-20 m tall with Lannea coromandelica Colona floribunda. Mallotus philippensis as the dominant tree species, and Microstegium ciliatum Eupatorium odoratum、Ageratum conyzoides are the dominant species in the shrub-herb layer.

对罗扎河下游鲜为人知的落叶季雨林进行了群落生态学研究,结果表明:罗扎河下游落叶季雨林群落高度在15~20m之间;群落乔木层以厚皮树、一担柴、粗糠柴、毛果扁担杆、灰毛浆果楝等树种为优势种;灌草层以刚莠竹盖度最大,其余如飞机草、藿香蓟、蹄盖蕨Athyrium sp。

To examine the hydrodynamic connectivity of the surface ocean in the reefs of the Belize Shelf, the upstream and downstream areas for the coral reefs of the Turneffe Islands and the Glovers Reef Atolls are calculated.

为了测试伯里兹大陆架海表面珊瑚礁之间的水动力连接特性,计算了位于Turneffe Islands Atoll和Glovers Reef Atolls珊瑚礁的上游颗粒来源区和下游颗粒耗散区,在30天内到达这两处环形珊瑚礁的近表面颗粒的可能来源区包括该两者周围的浅水区域、两者之间的深水区域和洪都拉斯Bay Islands的沿岸水域,Turneffe和Glovers Rcef Atolls 30天下游耗散区分别覆盖了伯里兹大陆架的中部和南部水域。

The shear layer vortices dominate in the initial portion of the jet, which are a result of the K-H instability. The crossflow encounters an adverse pressure gradient ahead of the jet and separates to form horseshoe vortices under the pressure downstream, and they develop into the wake. The wake vorticity comes into being in the actions of an adverse pressure gradient and a wall-normal component of vorticity, which originates from the wall boundary and is entrained into the jet. The shear layer vortices encounter adverse pressure gradients in the lee of the jet and break down, leading to the formation of the CVP and the CVP is the most important characteristic of the jet in crossflow.

文中指出:剪切层涡源于射流与横流之间的K-H不稳定性;马蹄形涡的产生是由于射流喷口上游迎风侧的壁面边界层内存在逆压梯度,使流动发生了分离,在下游逆压梯度的挤压作用下,形成了马蹄形涡,马蹄形涡向下游发展,进入尾迹区;在逆压梯度和法向涡生成项的共同作用下产生了尾迹涡,尾迹涡源于壁面边界层,止于射流,并将部分涡量向上输运至射流内部的CVP;CVP是横向紊动射流的重要特征,剪切层涡破裂后,在逆压梯度的作用下CVP形成。

The enlargement of the channel width in the downstream of the both Y and Tee branch will make the flow more complicated and produce more recirculations in the downstream channel of the both branches.

下游流道宽度的增大,会增加流场的复杂性,同时也会在下游流道中产生许多回流。

The aerators are widely used in flood discharge tunnel s and spillways to prevent the cavitation damage of the structures,and air is sucked by flow from the bottom in normal aerator.

龙抬头明流泄洪洞采用常规的底部掺气设施,容易在反弧末端下游附近侧墙处形成掺气盲区,从而导致该侧墙的空蚀破坏,反弧末端下游侧墙是龙抬头明流泄洪洞掺气减蚀设计的重点和难点。

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However, as the name(read-only memory)implies, CD disks cannot be written onorchanged in any way.

然而,正如其名字所指出的那样,CD盘不能写,也不能用任何方式改变其内容。

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A single payment file can be uploaded from an ERP system to effect all pan-China RMB payments and overseas payments in all currencies.

付款指令文件可从您的 ERP 系统上传到我们的电子银行系统来只是国内及对海外各种币种付款。