... the centrifuge rotates at a low speed, operate the manual scraper device, scrape the material in the radial direction ... , borax, dyestuffs, pesticides, salts, gourmet powders, foodstuff additives, chemical flavors, antibiotics, vitamins, the metals like copper, zinc and aluminum ... rather strong suitability for material to be separated. The manual scraping speed can be optionally adjusted, it is ...