1. Weight: 73 tons is the weight of the tail gas tower. The lifting capacity of the crane must be greater than or equal to 73 tons to ensure that the tail gas tower can be safely lifted and transported.
2. Height: 33m is the height of the tail gas tower. The crane must have enough lifting height to lift the tail gas tower from the ground to the required position.
3. Ground conditions: The crane needs stable ground support when lifting and carrying heavy objects. If the ground conditions are poor or uneven, additional support measures or larger cranes may be needed.
According to the information provided, we can confirm that the lifting capacity of the crane must be greater than or equal to 73 tons, and the lifting height should be at least 33 meters. The specific crane model and specifications will be determined according to the actual situation and use conditions. It is suggested to further negotiate and evaluate with professional crane suppliers or engineering contractors to ensure the selection of suitable cranes.