矿井

In view of these problems,an intrinsically safe pilot circuit for underground motor intelligent protective systems based on single chip microcomputer is given according to the design specifications of intrinsically safe circuits and the requirements of microcomputer control systems.

针对这些问题按照本安电路设计规范和微机控制系统的要求，设计了一个适合矿井电动机微机保护系统用的本安先导电路，对所设计的电路进行了试验研究并将其应用于矿用隔爆型电磁起动器。

Professional management of various oil machinery and equipment for oil fields, wells, mines and other industrial building supply various models of the three cone bit, PDC drill, drill pipe, fishing tool.

专业经营各种石油机械设备，为油田，水井，矿井等工业建设供应各种型号三牙轮钻头，PDC钻头，钻杆，打捞工具。

The deserted mining village, protruding pitheads overgrown with tall trees and rustling refineries behind crumbling walls situated in valleys, were surrounded by thick wooded mountain slopes, hot springs gushing out here and there.

这个废弃的采矿村子四周群山环绕，山上树林密布，温热的泉水随处涌出；在山谷里面，突兀着的矿井口上长着参天大树，破败的屋墙后是锈迹斑斑的冶炼设备。

The deserted mining village, protruding pitheads overgrown with tall trees and rustling refineries behind crumbling walls situated in valleys, were surrounded by thick wooded mountain slopes, hot spring gushing out here and there.

这个废弃的采矿村子四周群山环绕，山上树林密布，温泉的泉水随处涌出；在山谷里面，突兀着的矿井上长着参天大树，破败的屋墙后是锈迹斑斑的冶炼设备。

I've quite become used to working in the pit.

我已经很习惯在矿井里工作了。

Willow, Green East, Yuan shops, Yuan shop 2 mine 4 pairs of mine is stepping up its construction.

杨柳、青东、袁店、袁店二矿4对矿井正在加紧建设。

China's coal production and the exploitation of workers in well-oriented, while the underground work is first of all faced the problem of ventilation in the mine production process, we must continue to be ground fresh air supply to the various underground sites for staff and the exclusion of breath, and diluted Underground a variety of toxic and harmful gases and mineral dust, mine to create a good environment to protect the underground staff's health and labor safety.

我国煤炭生产以井工开采为主，而地下作业首先面临的是通风问题，在矿井生产过程中，必须源源不断地将地面新鲜空气输送到井下各个作业地点，以供人员呼吸并稀释和排除井下各种有毒有害气体和矿尘，创造良好的矿内环境，保障井下工作人员的身体健康和劳动安全。

The methods to simulate the wrapping of the wire rope on pulleys and the varying elasticity of wire may give a reference to the system dynamics study for the similar structures varying with time,such as drilling rig,oil well hoisting system.

该仿真模型中解决钢丝绳与滑轮间的缠绕和钢丝绳的刚度随时间变化的方法也可为研究钻机、矿井提升系统等类似的时变结构系统动力学时借鉴。

Considering the precondition that coal mining in western area must protect good water resources, the developing height to grasp the movement and failure of overburden strata and the relationship between water-flowing fractured zone and overlying water are researched.

结合西部地区煤炭资源的开采必须要保护好水资源这一前提，研究覆岩中导水裂隙带的发育高度，掌握覆岩的移动破坏规律和导水裂隙带与上覆水体之间的关系，从而合理确定煤层的安全开采上限和采煤方法，对于实现矿井的安全生产、保水采煤及生态环境保护，都具有十分重要的理论意义与实际价值。

As the "Hydraulic safety Closed Spring Loaded Low Lift Type-High Pressure Safety Valve valve," has two levels pressure relief function and pressure from low to high pressure limiting function; with limited pressure relief and anti-corrosion properties of good stability and reliability advantages of the patented product may greatly enhance and expand power systems and hydraulic equipment hydraulic mine support equipment, quality and performance.

由于&气动液压安全阀&具备二个级别卸压功能和从低到超高压力的限压功能；具备限压卸压稳定可靠和防腐性能好的优点，本专利产品可极大地提升和拓展液压动力系统和液压设备矿井支护设备的品质和性能。

Since historical times,England ,where the early inhabitants were Celts, has been conquered three times .

从有历史以来，英国，在此地早期居住的是凯尔特人，已经被征服了三次。

Bluetooth OBEX File Transfer Enables the sending and receiving of files on your phone via Bluetooth.

蓝牙OBEX文件移动允许经过蓝牙传送和接受文件。。。。