煤矿

At present, the developing direction of valves for shield support is high pressure and mass flow.

当前，煤矿液压支架用阀的发展趋势是高压大流量。

This article mainly introduces the coal mine hoister high voltage system enforcement purpose, the implementation process as well as the solution technical key.

摘 要：本文主要介绍了煤矿提升绞车高压变频系统的实施目的，实施过程以及其解决的技术关键。

According to the ,the paper analyzes the problem of oil-pressure calculation of the hydraulic station for hoister braking system in order to enhance the safe brake characteristic of the mine hoister braking system.

本文根据《煤矿安全规程》分析提升机制动系统液压站油压值的计算问题，以提高提升机系统的安全制动性能。

Chinese companies have been hungrily eyeing North Korea's mineral reserves, from iron ore to coal and gold.

中国的公司对朝鲜埋藏着的矿物资源望眼欲穿，这些矿藏从铁矿到煤矿及金矿。

Some colliers squatted upon their hunkers against the wall.

有几个煤矿工人靠着墙蹲着。

Some colliers squat ted upon their hunkers against the wall.

有几个煤矿工人靠着墙蹲着。

Base on the summarization of the 50 years safety and high efficient coal mining achievements with hydraulic powered shield supports in Huainan coal mines the paper analyzed the rational layout of the gateway,optimized geometric parameters of thecoal mining face,improvement in potential,reform and invonvation,production process control,mien water and mine fire prevention and control,the siutbal conditions for the pseudo inclined coal mining with flexible shild support and other key technologies.

1概况1956年淮南煤矿先后试验了木结构的平板型、撬板形、"く"形、"人"形，钢结构的弧形、弓形、"く"形、"八"形等掩护支架，通过多次工业性试验并对所试验的掩护支架结构进行了一系列改革和完善，终于形成了目前所用的钢结构八字形掩护支架。以单腿支撑式掩护支架为例，八字形掩护支架是由钢梁、钢丝绳、垫板和绳卡、U形螺栓、扁铁、柱托、滑托板等组成。

The use of hydrodynamics in mines is introduced,and expound the significance of hydrodynamics.

叙述了流体力学在煤矿中的应用，阐述了流体力学的重要性。

I really do. But then I wonder, with all my restless yearning, and with all my hyped-up fervor and this stupidly hungry nature of mine, what should I do with my energy instead.

我真的。但是，我不知道，我所有的不安与渴望，以及我所有的宣传工作热情和这个傻饿性质煤矿，我应该怎么办我的能源代替。

Is a product for communicate equipment, which supply connected equipment and control hypostasis safety power supply

DXJ-24矿用隔爆本安电源为煤矿通讯设备的配套产品，向关联设备提供充电、控制用的本质安全电源

And discuss some key point of integrated management system design, include hazard identification and risk assessment and risk control in the occupational health and safety management, the measure of satisfaction target of customer, the flawlessness of law system, the integration of the integrated management system and enterprise standardization system, unify lead institution and work orgnization, integreted internal audit and integrated management review.

同时，论述了一体化管理体系构建中的几个主要问题，包括职业健康安全管理中的危险源辨识、风险评价和风险控制、顾客满意度的科学监测、法律、法规体系的完善、一体化管理体系与企业标准化体系的有机结合、统一的领导机构和工作机构、一体化的内部审核和管理评审。

Deepwater Taranaki is investigated for its petroleum potential, using all available seismic data tied to shallow-water wells.

运用与浅水井相关的现有全部震波探测数据考察了深海区塔拉纳基盆地的油藏前景。