音标与读法

这里为大家介绍下nigrescence 是什么意思，希望能帮助到各位朋友。

中英文翻译

n.

变黑；(颜色；皮肤；眼睛等的)发黑。

例句与用法

1.Carbon channel is usually finished with electro - galvanization . hot dipped galvanzined finish or epoxy coating or nigrescence is also available on special order

碳钢型钢的表面处理普通为电镀，如需热浸镀锌、喷塑、发黑等要在订货时说明。

2.Reshi chemicals is a specialist in manufacturing and distributing metal surface treatment reagent : phosphorus treatment reagent , water treatment reagents , electro - plating additive reagents , normal temperature nigrescence reagent , pre - treatment reagents , etc

是一家专业从事金属表面处理药剂：磷化处理药剂、水处理剂、电镀添加剂、钢铁常温发黑剂以及前处理产品的生产商和代理商。

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