A punch-cutting tool, or machine for deepening and enlarging the spaces between the teeth of a worn saw.
deepdeepen
vi. 深化vt. 使加深,使强烈
deepened
v. 变深, 加深( deepen的过去式和过去分词 ); 加浓
deepening
n. 加深, 延深；向下侵蚀
deepens
v. 变深, 加深( deepen的第三人称单数 ); 加浓
overdeepening
[地质]过量下蚀
