Complex sentence: The damaged barrels were not yet repaired, because of the obstruction of the German Armistice Commission, and the Dakar dockyard capacities were only able to remove the starboard central propeller with a floating crane, but not repair the blocked shaft.
Split into simpler sentences: The damaged barrels were not yet repaired, because of the obstruction of the German Armistice Commission. The Dakar dockyard capacities were only able to remove the starboard central propeller with a floating crane, but not to repair the blocked shaft.