Simple past and past participle of blue (to make or become blue).

blue 的过去式和过去分词

• 使…变蓝；变成蓝色

Treated steel by bluing to form a rust-resistant finish.

通过发蓝处理钢表面以防锈

• 施加受控氧化层以保护

Having a chemically passivated blue-black surface, especially of steel.

用洗衣蓝使白色织物更亮白

• 加入蓝色剂使白色看起来更洁净

Added laundry bluing to whiten fabrics or brighten whites.

钢材已化学发蓝

• 具有蓝黑色的钝化表面