ECO piston casting by manual pouring

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Eco piston becomes more popular because material saving is encouraged more and more globally.
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Hola, sabe quién es el proveedor que fabrica esa máquina ? Gracias

diegonicolasgroba
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Hello, do you know who the manufacturer of that machine is? thank you

diegonicolasgroba
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What is this white covering inside the mold?

nejiaakermi