Auto frying pan cauldron is used for stir-frying coal,firewood,gas,oil crops and so on. Type Description Auto frying pan cauldron/castiron frying pan/frying pan is used for stir-frying coal,firewood,gas,oil crops and so on. As we all know,it's better to fry the oil crops before squeezing them in oil press machine.Because it's convenient to let oil exude,then you can get higher oil output.