Transformer 8-24VAC, why in my factory production is crucial?

The main transformers we produce are dry type power transformers and oil immersed power transformers. Transformer 8-24VAC, is the majority of customers need the scope of the transformer, therefore, our factory mainly produces transformers 8-24 VAC, At present, customers who have bought our transformer 8-24VAC have a very high probability of buying back this transformer, therefore, the main source of income for our factory is also the transformer 8-24 VAC

Transformer 8-24VAC, why in my factory production is crucial?-SPL- power transformer, distribution transformer, oil immersed transformer, dry type transformer, cast coil transformer, ground mounted transformer, resin insulated transformer, oil cooled transformer, substation transformer, switchgear