Бөмбөлөгт тээрэм ган доторлогоо
бөмбөлөгт ган бөмбөлөг. Хятад Хуурамч ган бөмбөлөг үйлдвэр ба. Model/Size:30-150mm Product Detail: Forging steel roling ball is made of round steel as raw material, which is physically processed by new rolling and forging technology and then manufactured by special heat treatment technology ...