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"