General small shops and machinery repair shops should be ok. Those are essential oils, and everything can be repaired. If this is not specially repaired, it is more expensive for you to go to a health care shop. The small repair shop in that street has everything and the charge is not expensive. If you are not at ease, go to the specialty store of medical supplies and health care products store and find a bigger one with after-sales maintenance department. Tell me some money to repair it. Although it is not their brand, some people are willing to do it. You can also negotiate with the master in the store privately, bypass the boss in the store, and you can start a big project in about 50. Small question 20-30, let's buy a pack of cigarettes.