1.apply to SOOSAN, FURUKAWA, MSB, Krupp 2. Heat treatment: ensure product stability 3. ringlike oil way ... SANHA, SOOSAN, KWANGLIM, MSB, D&A, HANWOO, DNS, DAEMO, MIRACLE, KRUPP, RAMMER, NPK, INDECO, TOKU, INDECO, TOKU, OKADA, GENERAL BREAKER, COMET ...