First of all, we are very concerned about the situation that is expressed, and we understand your feelings. 1. We already will track the quality and usage of all our sold equipment, respond positively to problems that arise, and we will provide corresponding after-sales treatment for non-human reasons. 2. The crusher you resell to this customer is a hammer crusher. I wonder what the raw material he is breaking now is? 3. Can I get more detailed pictures or videos? I asked you several times and did not receive more detailed pictures and videos. In the first video, I can't see which part of the hammer it is, and the phenomenon in the second video is normal; when the machine goes from rotation to stop, the hammer will definitely fall down, which will cause a certain amount of wear and impact. 4. Once the exact cause is identified, we will have a positive solution. ...