dulling agent

例句：

1. 1. The chemical used in this process is a type of dulling agent.
   这种工艺中使用的化学物质是一种类型的钝化剂。
2. 2.The company uses a special dulling agent to protect its products from scratches.
   该公司使用一种特殊的钝化剂来保护其产品免受刮擦。
3. 3.The engineer explained that the dulling agent was crucial for the product's durability.
   工程师解释说，钝化剂对于产品耐用性至关重要。