1, number of holes: Generally speaking, novices who sell baked sweet potatoes recommend ovens with holes of 1 1 or 12, and sweet potatoes are cooked quickly. If it is an oven with two carbon holes, one hole is 14 hole.

2. Material: There are iron and stainless steel sweet potato machines on the market. It should be noted that some unscrupulous merchants will use stainless steel paint as stainless steel.

3. Price: 9-hole and 1 1 hole sweet potato machine is between 700-900 yuan, and stainless steel may be a little more expensive. There are seven and five drawer irons, and the advantage of having two more small poles is that it is not easy to break the skin when pulled out.