锻锤
锻炼锤
压紧锤

Shingling \Shin"gling\, n.
1. The act of covering with shingles; shingles, collectively;
a covering made of shingles.

2. (Metal) The process of expelling scori[ae] 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.