... :High-speed rounding, 1400 circle/minute with the specific abrasive liquor, can produce magnetic changing effect to stainless needle. ... kinds of rigid plastics and non-magnetoconductivity metals4, the abrasive liquor is environment protection material.no-poison, no-pollution ... alloy, Ti alloy, and so on.TM-S001 abrasive liquor: used for abrasive the material. Such as stainless, copper, kirsite, ...