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device for detecting leaking to the kabelmantel of a tragdraht aufgehaengten and for checking the tightness of the kabelmantels gefuellten luftkabels with compressed air from the ground
device for detecting leaking to the kabelmantel of a tragdraht aufgehaengten and for checking the tightness of the kabelmantels gefuellten luftkabels with compressed air from the ground