delta metal

短语

释义与例句

n.
  1. 1.

    A brass alloy consisting of copper (55%), zinc (41-43%) and iron (1-3%), with the balance consisting of various other metals. The proportions used make the material harder and suitable for valves and bearings.

    不可数

词源

The three metals are symbolised by the triangular (delta) shape.

来源：wiktionary