by our company based on international advanced sample preparation methods. It uses sand belts for grinding and can be replaced with different numbers of sand belts as needed, making replacement convenient. Replace grinding machines, pre grinding polishing machines, and manual sandpaper grinding. Each sand belt only takes 1-2 minutes to complete the operation. Grinding and polishing the spectral standard samples in the spectral analysis room not only saves time and effort, but also saves a lot of sandpaper, ensuring safety, reducing costs, ensuring quality, and improving work efficiency. This product is widely applicable to enterprises and institutions, metallurgical machinery enterprises, metallographic inspection rooms, spectral rooms, etc