1.Made up of activated carbon 2.used for absorb poisonous gas 3.special gift for car hanging 4.Artistic additive value About charcoal carvingIn 1914-1918 the introduction of poisonous gases into the battlefields of the First World War gave great impetus to the development of large-scale production methods for adsorbent carbons suitable for use in military respirators. Granulated carbons, with ...
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