shang @couplingcopperz ?

activo hace 3 años, 10 meses
  • shang ha escrito una nueva entrada en el blog: Moreover, the second surface layer consumes more materials than the first   hace 3 años, 10 meses · Ver

    The fixed cost of casting sharing is actually a part of the marginal profit of castings. The cost of refurbishment is mainly affected by the quality requirements of the casting and the primary pass rate of the casting. The difference in shell manufacturing cost is calculated based on the pouring weight. The labor cost, fuel […]

  • shang ahora es un usuario registrado   hace 3 años, 10 meses · Ver