يو ضع الميزان الحساس في صندوق زجاجي لعدم تاثره بالهواء المحيط به او بدرجه الحراره اوالغبار نظرا لانه يقيس مواد غاليه الثمن مثل الذهب والفضه
The sensitive balance is placed in a glass box to prevent it from being affected by the surrounding air, temperature, or dust, as it measures expensive materials such as gold and silver.
