生锈程度 meaning in English

degree of rusting

Preparation of steel substrates before application of paints and related products - visual assessment of surface cleanliness - specification for rust grades and preparation grades of uncoated steel substrates and of steel substrates after overall removal of previous coatings
涂料和有关产品应用前钢基片的制备.表面清洁度视觉评定.未涂层钢基片和钢基片全部清除原涂层以后生锈程度和制备程度的规范