These heavy-lift derricks are usually arranged so that they can swing through the gap between the two king posts that support them, and so are able to serve two holds.
Ezi zilenge zinzima ziphakamisayo umthetho wazo ziyakwazi ukuba nakho ukubhabha kwisithuba esiphakathi kweekumkani ezimbini zezithuba ezixhasayo kwaye ziyakwazi ukunceda iindawo ezimbini.