Process for constructing vertical or nearly vertical mine areas and wells or pits for other purposes by using express lifts
DE4017259A1
Structure for underground chamber - is used in transition area between gallery and coal face, floor beam, and gallery frame beam
HU900179D0
Loud-speaking telephone system connectable on mains
HUT58122A
Structure for supporting mineral area particularly area being at the appointment of drift and mining
HUT48943A
Supporting construction for mine tunnel support and supporting assembly for corner support at the intersection fo mine tunnel and transverse longwall and for support of the joining part of the tunnel
DD262523A1
Apparatus for data transmission to traiter frequency for retrieving the data between rated machines through a power cable
HUT45326A
Computer diagnostic measuring apparatus for electric drives
HUT43773A
Carrier frequency data transmitter for diplex transmitting signals of information through power cable
HUT41091A
Supporting unit at underground widework for mechanized supporting equipment
HUT41090A
Rock screw first for rock supporting in mines furthermore device for builting-in same
HUT38701A
Mechanized mine support
HUT35394A
High voltage fault detector circuit
DD214887A1
Method and device for travel frequency remote control with duplex operation, especially for removal and loading machines
HU186498B
Method and device for visual following and/or controlling delivery of the products conveyed by the belt conveyor system
BG45706A3
Device for digital information input
HU185998B
Device for carrier frequency remote control of a cutter-loading machine with cutter roll in mine
HU183140B
Sensing unit and code-translating equipment for data collecting system
HU187840B
Data transfer circuit
HU181079B
Tensioning member particularly for suspension chanis of variable length
