Which of the following is one of a fixed particle?① hørning (Honing)② wrap (Lapping)③ the liquid honing (Liquid honing) ④ the barrel processing (Barrel working)
Of the particles then are processed by secure? ① honing (honing) ② lapping (Lapping on the) ③ honing liquid (Liquid honing) ④ processing barrel (Barrel working)