maximum permissible dustiness

例句：

1. 1.The factory has a maximum permissible dustiness of 5 mg/m³.
   该工厂的最大允许粉尘含量为5毫克每立方米。
2. 2. The construction site had to comply with the maximum permissible dustiness standards.
   建筑工地必须遵守最大允许粉尘含量标准。
3. 3.The engineer carefully measured the maximum permissible dustiness of the air before starting work.
   工程师在开始工作前仔细测量了空气中的最大允许粉尘含量。