粗锌

例句：

1. 1. The carwas rusted and needed to be repainted with a coarse zinc coating.
   这辆车生锈了，需要用粗锌涂层重新涂漆。
2. 2. Theconstruction workers used coarse zinc to reinforce the beams.
   建筑工人使用粗锌加固梁。
3. 3.Coarse zinc is often usedas an alternative to lead in soldering.
   粗锌常被用作焊锡的替代品。