What is the fine-grained topic of the following text: Kunshan JST Industry Co., Ltd is a professional manufacturer of CNC machining parts, plastic mold & plastic injection molded products, castings & forgings, stamping & welding parts, which were applied to the field of medical device, aerospace & aviation, food equipment, auto parts, electronics, etc. Only return the topic.
CNC Machining and Manufacturing Services by Kunshan JST Industry Co., Ltd