shingling
  壓擠熟鐵塊; 疊瓦作用
  Shin·gle, v. t. [imp. & p. p. Shingled p. pr. & vb. n. Shingling ]
  1. To cover with shingles; as, to shingle a roof.
     They shingle their houses with it.   --Evelyn.
  2. To cut, as hair, so that the ends are evenly exposed all over the head, as shingles on a roof.
  Shin·gling n.
  1. The act of covering with shingles; shingles, collectively; a covering made of shingles.
  2. Metal The process of expelling scoriae and other impurities by hammering and squeezing, in the production of wrought iron.
  Shingling hammer, a ponderous hammer moved by machinery, used in shingling puddled iron.
  Shingling mill, a mill or forge where puddled iron is shingled.
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  shingling
       n 1: (geology) sediment in which flat pebbles are uniformly
            tilted in the same direction
       2: the laying on of shingles; "shingling is a draft very
          different from carpentry"