ammonium fluoride etchant

例句：

1. 1. This chemical is used to etch metals in electronics manufacturing.
   这种化学品用于电子制造业中金属的蚀刻。
2. 2.The engineer used ammoniacal fluoride etch to remove the rust from the metal parts.
   工程师使用氨氟酸蚀刻剂来去除金属部件上的锈。
3. 3. During the process, the ammoniacal fluoride etch was carefully applied to avoid damaging the delicate circuitry.
   在处理过程中，小心地应用氨氟酸蚀刻剂以避免损坏精细的电路。