Main Delivery is a job title that involves the delivery of GAS. It requires the individual to transport and deliver GAS to customers in a safe and efficient manner. The individual must also ensure that all safety regulations are followed and that the GAS is delivered on time. Additionally, they must be able to troubleshoot any issues that may arise during the delivery process. Main Delivery is an important role in the GAS industry as it ensures that customers receive their GAS in a timely and safe manner.