Coal Abstracts

Coal Abstracts

4.11 - 1251 ratings - Source

89:05802 Drilling equipment Development of remote control technology for boring Murakami, F.; Satani, M.; Tanaka, M.; Yoshida, ... device; 3) automatic retraction mechanism for preventing loss of rods and auger bit in the borehole due to collapse of hole; 4) use ... 418-421 (Sep 1988) Lists main areas of development of hydraulic equipment for use in underground coal mines: increasing service life andanbsp;...

Title:Coal Abstracts
Publisher: - 1989


You Must CONTINUE and create a free account to access unlimited downloads & streaming