"Kirow Ardelt GmbH Eberswalde, referred to as Ardelt, is a German crane manufacturer. The company specialises in manufacturing double jib level luffing cranes which are based ...
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on the patented double jib principle. Ardelt has produced more than 4,700 harbour cranes. Ardelt also makes single jib-level luffing cranes and balancer cranes. The range also includes a mobile harbour crane with a high gantry that is also based on the double jib system." - (en.wikipedia.org 06.11.2023)