scholarly journals Electrohydraulic control systems for powered roof supports in hazardous conditions of mining tremors

2021 ◽  
Vol 14 (4) ◽  
Author(s):  
Dawid Szurgacz
1988 ◽  
Vol 104 (3) ◽  
pp. 363-372 ◽  
Author(s):  
Nicholas C. Barrett ◽  
Denis J. Glencross

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