Hydraulic and earth engineering
Earth treatment or control
Shoring, bracing, or cave-in prevention
Inventor
active
Coupling gear for lemniscate shield timbering frame
Frictional revolving joint
Methods of translating a face support
Shield type support for use in underground mining with lemniscat
Shifting device connected with a longwall conveyor for a progres
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Profile ID: LFUS-PAI-P-1182081