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Nylon fibre was strong, elastic and light. It was lustrous and easy to wash. So the ropes are made up of nylon. Parachutes also made up of nylon.
Gantry cranes are commonly seen on docks and are used for lifting containers. There are also smaller versions of gantry cranes that can be used inside workshops or other industrial buildings.
Sisal, fibres of the plant Agave sisalana are used to make ropes.
It is to monitor whooping cranes habitats.
Tower cranes are most commonly used in construction industry and used both to lift and lower materials and to move them horizontally. Propose of Tower cranes is lifting heavy things and transporting to other places.
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You need ropes to dock so your ship doesn't float away.
Slaves used ropes used ropes and ramps to build the PYRAMIDS , as the stones [building blocks of pyramids] were too heavy to carry with hands or on their backs.
One can find an auction site for used cranes on the internet via 'RB Auctioneers'. Other online auction sites for cranes include 'Machinery Trader' and 'IronPlanet'.
Any metallic salt is used for fruits !
The cranes on board cargo ships or older passengers ships are used when the ship arrives at a port which does not have any cranes or the cranes are not large enough to lift cargo from the dock to put into the cargo hold of a ship.
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