Microstructure of powder metallurgy material surface layer modified by laser cladding nano-Al_2O_3

Chinese folklore says that every second day of the second lunar month is the time when the dragon in charge of the rain lifts its head.

在中国，龙抬头是个吉祥的日子，俗话说“龙不抬头，天不下雨”，龙是祥瑞之物，又是和风化雨的主宰。

The numerical simulation analysis and optimal design for the intersection of diversion tunnel and discharge tunnel are conducted.

对紫坪铺水利工程1泄洪洞龙抬头段与前期导流洞交叉重叠段在施工开挖阶段围岩及支护结构的强度与变形稳定性进行了有限元数值仿真分析和优化设计。

The test and verification of the Z-shaped ski-jump energy dissipator has proved that the reduction of the overflowing cross section of the middle gate shaft is an effective means to avoid cavitation that may be caused due to rapid variation of water flow.

本文通过对┓型龙抬头试验研究、验证了避免水流急剧变化而产生空蚀的较有效的方法是：缩小中间闸门井的过流断面。

Most Chinese northern farmers believe that with the help of that day, all stores, big and small, will be full of grain.

中国北方的农民深信龙抬头后雨水充足这事，到时粮仓无论大小都会装满粮食。

After that day, there will be more and more rain, so that day is also called Spring Dragon Day.

过了龙抬头这天，雨水充沛，所以这天被称为春龙界。

Test and Study of Ski-jump Energy Dissipator of Diversion and Spillway Tunnels for Large and Medium River Reservoirs

大中河水库导流泄洪洞龙抬头试验研究

Dragon Palace In GuiZhou Waking Up

贵州龙宫龙抬头

Calculation of Flow Field of Flood Tunnel Bucket with Streamline Iteration Method

用流线迭代法计算龙抬头泄洪洞反弧流场

Study on Cavitation-protection for Downstream Sidewalls of Ogee-section in Spillway Tunnels

龙抬头明流泄洪洞反弧段下游边墙防蚀探讨

The cavitation damage is prevented effectively in many spillway dragon-raise-head tunnels by aeration facility.

通过设置掺气设施，大多数龙抬头泄洪洞都较好地防止了空蚀破坏。

The dragon saves spring (the dragon raises head)

正月十五春龙节（龙抬头）

The Study of Experiments on Installing the Orifice Plate in the Longtaitou Section of Flood-cavity

泄洪洞龙抬头段设置孔板的试验研究

Study on the sidewall aerators of high head ogee spillways

龙抬头式泄洪洞反弧末端边墙掺气减蚀设施的研究

Summary on Cavitation Research of Ogee-section in Spillway Tunnels

龙抬头泄洪洞反弧段空化空蚀研究进展

Today is the Dragon-Head-Raising Festival in Northern China.

今天是中国北方的龙抬头节。

February 2 Lunar rise, the Popular Longxumian eat.

农历二月二龙抬头，有吃龙须面之俗。

Summary of study on ogee-section cavitation in longtaitou spillway tunnels

龙抬头泄洪洞反弧段空化空蚀研究综述

In the "dragon rise" segment spillways which have been completed in China , some have been damaged .

在我国已建成的运行的龙抬头式泄洪洞中，部分泄洪洞已经遭到破坏。

Longtaitou Festival is a traditional Chinese festival held on the second day of the second month of the Chinese calendar.

每年农历的二月初二是中国的传统节日龙抬头。

The cavitation damage is prevented effectively in many spillway dragon-raise-head tunnels by aeration facility.

通过设置掺气设施，大多数龙抬头泄洪洞都较好地防止了空蚀破坏。