long-wall

State officials said the mine was a long-wall mining operation, which is one of three major underground coal-mining methods.

She was walking beside the long wall of the secret garden, when a most wonderful thing happened.

Therefore both from technical and economic points of view, the powered support is a very important piece of equipment in a long wall face.

The Long Wall -- the longest monument in Southeast Asia -- could become a major tourist attraction.

Crews in Iowa have been ordered to abandon a half- mile -long wall of dirt and sandbags because they're worried it's about to break.

Quang Ngai's Long Wall is not the province's only potential resource for tourism.

The Great Wall in China's vast land, something which with a roll, momentum majestic, for more than ten thousand inside long wall.

After the forest, we passed by some Tibetan houses, fields and a long wall of prayer wheels.

The project consists of a nine-meter-long wall made up of 400 plaster vagina molds.

The strike long wall method and jump mining are used in the faces of Zhengzhou Coal Industry Group Comp.

A long wall wraps around the perimeter of the lot.

Long- wall double working- face combined winning technical practice in faull lager small section coal seam.

The long wall of blood and meat.

l "the application of high voltage equipment on long wall system" , published by world coal technology on issue 3, 1992.

It's a long wall circling round another temple, a much smaller one.

It is very hard to build such a long wall.

It is a long wall which runs more than 5, 000 kilometres across northern China.

Look, what a long wall it is!

The Long Wall stretches for 127km and was used to regulate trade and travel

Characterization of UHF radio propagation channels in a long wall face of a coal mine

Practice and usage of the working face layout plan following the long wall

Mining Practice of the Upscale Ordinary Mechanization Mining Long Wall Working Face of the Compound Hard Roof

Analysis on Numerical Simulation of Ventilation Control Range and Safety Assessment of Fully Mechanized Long-wall Top Coal Caving Face

Mechanical solution of the maximum point of dynamic abutment pressure under deep long-wall working face

Probe for Nitrogen Infusion Technology Applied to Heavy-Gas Soft-Seam Sublevel Caving-in Long Wall

The Application in He Gang Ming Group of Difficult Coaled Laneway's Long Wall and Lughole Explosion, Excavating Coal Techniques

Preliminary Discussion on Long-wall Fully Mechanized Stoping Technology for Working Face with Steep Dip Angle

Application and improvement to the signal controlling device in mechanized caving long wall face

Design Prioritization of Sublevel Caving-in Long Wall Work Face with Complex Geological Conditions

Analysis and application of the moving regulation of roof and floor in long-wall face with big angle

Fully - mechanized Coal Winning Technology of Big Mining Heigh of Inclined Long- wall and Auxiliary Unit

Discussion on Roof Stress Regularity at declined Long-wall comprehensive mining face

vehicle crew cap with a long wall, together with badges for boldface;

The causes of spontaneous combustion and the analysis on fire-prevention methods in long-wall caving mining

Application on Driving Ways of Oblique Long-wall Mining Face in Shallow Hole Shrinkage Stoping

Mining of No Beforehand to Dig the Roadway of the Dip Long-wall Megaton's Double-Unit Faces

Long wall mechanized top-caving techniques along strike in steep-inclined thick coal seam

Technology of long wall working face with single support crossingfault group in high inclination-angle coal seam

The Application of Several Styles of Sloping Long-Wall in Tunneling Layout

(n) long wall of earth, etc to keep back water and prevent flooding

Working Resistance and Safety Margin of Long-wall Support in Shallow Coal Bed

long wall mining method along the dip;

Probing the moving and Installation process in the high long wall face

Cure Technology of Long Wall with Top - Coal Caving Mining

Control on top coal caving in long wall top coal caving working face

Study on Hard Roof Shearing Strength in Long Wall Mining

Underground Pressure Observation and Roof Classification of Long-Wall Face in No. 8 Seam of LuYukou Mine

a long wall which runs more than 5000 kilometers across northern China

a long wall with towers