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  1. ...)或上述產品之混合物或化合物,其重量超過50%者 Refractory bricks, blocks, tiles and similar refractory ceramic constructional...

  2. ...重量超過50%者,但矽化石粉製品或類似矽土製者除外 Other refractory ceramic goods, containing by weight more than 50% of graphite or other carbon...