To make your own jewellery cleaning solution, mix one part ammonia to six parts water.

使自己的珠宝清洁液，其中部分组合为六个部分氨气水。

youdao

To make your own jewellery cleaning solution, mix one part ammonia to six parts water.

使自己的珠宝清洁液，其中部分组合为六个部分氨气水。

youdao