Is there a big wage gap between the lathe workers in front of the furnace and the lathe workers on the heat treatment day when they retire?

Not big. There is little difference in wages between the lathe worker in front of the furnace and the crane worker in heat treatment when they retire. Crane drivers are crane drivers in large workshops or open-air warehouses. Crane operators are also called special types of crane operators, that is, bridge crane operators. Latchers in front of the furnace and those before heat treatment are special jobs, so there is little difference when they retire. Crane drivers belong to special equipment operators, and their work seems simple and ordinary, but in fact they have great responsibilities.