coal mine tunnel是什么意思

用法例句

Through the ray tracing method, the transmission characteristic of UHF wide band radio wave in coal mine tunnels is investigated by the Matlab software.

应用射线跟踪法,通过MATLAB仿真工具仿真研究在井下巷道中,UHF频段的宽带电磁波的传播特性。

On the Rectification and Strengthening of Underground Safety of Non-coal Mines;

论非煤矿山的井下安全整治

Treatment of underground outer source fire of coal mine;

煤矿井下外源火灾的处理

Danger analysis and management technology for underground working place of Chengchao iron mine;

程潮铁矿井下作业场所危险分析及管理技术

Research and shop tests of the downhole casing shut-off valve;

井下套管阀研究及室内试验

Theory design of downhole ultrasonic focusing system;

井下超声聚焦系统的理论设计

Preliminary approach to oil production through downhole oil-water separation technique.;

井下油水分离采油技术初探

A mechanical floating is used because of instrument,water quality and down hole tools that make in-correct result measured or instrument blocked down hole.

介绍了一种用于油田注水井注水分层测试超声波井下流量计。

In the light of the serious erode situation of down hole stems,hanging ring technology for erode monitor to oil well dill stem in Lunnan oilfield has been used.

针对井下管柱腐蚀严重的情况 ,轮南油田采用了井下挂环技术对油井管柱的腐蚀状况进行监测。

Since the function of separation,the oil is pumped to ground and water injected to down hole.

有杆泵井下油水分离装置由静态旋流分离器和抽油注水双作用泵 2部分组成。

Study on scheme of IF mobile communication in coal mine underground;

煤矿井下中频移动通信技术方案研究

The status of mobile communication in coal mine underground is introduced, the difficult technical problems including laneway infection for wireless transmission and weak signal reception and noise interference are analyzed, and ways to solve these problems are proposed.

介绍了我国煤矿井下移动通信现状,分析了技术上的难题-巷道对无线传输的影响、弱信号接收和井下环境噪声干扰,提出了解决途径。

HPHT downhole switching valve is developed.

研制的高温高压井下开关可在注汽时打开注汽通道;油井作业时关闭注汽通道。