On the construction site of urban rail transit, there is a bustling scene. Various large machinery roared and workers shuttled through it. Among them, the installation of rail transit equipment is one of the most critical links.

These types of rail transit equipment are diverse, such as signal systems, power supply equipment, communication equipment, etc. They are like the "nervous system" and "energy source" of urban rail transit, and any small deviation may affect the operation of the entire rail transit system.

The workers encountered difficulties when installing these devices. Some devices require extremely high installation positions, and even a slight deviation can affect subsequent debugging and operation. At this moment, the chain hoist appeared. It is like a precise 'fine-tuning master', where workers gently pull the chain to adjust the position of the equipment with minimal amplitude.

I saw Master Li fully focused on operating the hand pulled gourd, his eyes fixed on the equipment, and his mouth murmuring the adjusted scale. Under his careful operation, the equipment that was originally slightly off center slowly returned to its original position. Xiao Zhang next to him is assisting, constantly monitoring the levelness and verticality of the equipment. After several hours of effort, the equipment was accurately installed in place with the help of a chain hoist. At that moment, everyone's faces showed a relieved smile, because they knew that this small chain hoist played an indispensable role in the construction of rail transit.