noun [物质名词] 靛青漂白粉；发蓝处理
Pretreatment, bluing and post treatment of this process were introduced. 介绍了前处理、发蓝及后处理工序。
verb [vt. 及物动词] 把……染成蓝色（blue 的 ing 形式）
The practice shows that proper measures can be taken to effectively prevent red exo-frost on bluing coating. 实践证明，采用适当措施可以有效防止发蓝膜的红色挂霜。
