... plane & round dual marking type: NCQ/B-135/200/250C portable type: NCQ/C-110/150, NCQ/C2-110/150 ( ... girders, engine, connecting rod, cylinder, piston, cylinder sleeve, gear, water pump, steel spring plate etc.2. Machinery industry: to mark on ... , hardware products, steel pipes, casing pipes, couplings, roller cone, pump body valves, ring flanges, fasteners.3. Electrical or Electro-Mechanical ...