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The Taiheiyo Engineering Inc. patent solves the following problem:
Longwall use a drum shearers, it has so far found a great deal of coal dust produced by the working face when a coal wall felled.
Our analysis of this patent is as follows:
Taiheiyo Engineering Inc.’s patent US 4067618 A deals with Apparatus for protecting of coal mine workers.
A tool for the protection of coal mine workers from flying coal, stone, coal dust, scattering coal and the like, made of a drum shearer works at a longwall coal face . The facilities given to interior walls or rooms among iron props install self-development support given longwall coal face by using fastening members. The interior walls or room connected with the adjacent wall or room with a flexible connecting member.
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