The role of the mini antechamber is the role of transmission, acting as a transfer station. This means that small things such as wires can be put into the glove box first, and the contents of the glove box can also be taken out through the glove box.
The role of the main antechamber is also a transmission function, and a transfer station. It means that big objects such as glass bottles, bottle stoppers, battery cases, and glass bottles containing diaphragms can be put into the main antechamber and then taken into the glove box. The contents of the glove box can also be taken through the main antechamber.