Technical advances in the mechanization and automation of face work in steeply-sloping seams (35-90 degrees) ; choice of methods of working such seams according to geological, technical and economic conditions : note / by the secretariat.
1981
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Symbol
[E/]ECE/COAL/55
Title
Technical advances in the mechanization and automation of face work in steeply-sloping seams (35-90 degrees) ; choice of methods of working such seams according to geological, technical and economic conditions : note / by the secretariat.
Authors
Date
Geneva : UN, 2 Nov. 1981.
Description
[23] p., including annex : figures