And dirty steel belt surface, impurity and Pb phase accumulation during alloy belt manufacture lead to worse adhesion between alloy layer and steel back.

而在合金带的生产过程中，钢带表面未清洗干净，存在杂质及铅相偏聚等，是导致合金层与钢背之间结合不良的主要因素。

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It focuses on heavy industrial plants, factories in "dirty" or polluting industries like concrete or steel, or mining.

它重点是重型工业机械、“脏乱”的工厂或污染企业，如混凝土或钢铁或采矿。

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Water liquid, can remove dirty on stainless steel mirror surface effectively and quickly, showing metallic brightness of the surface, especially for cleaning stainless steel mirror surface.

本品为水性液体，能迅速有效去除不锈钢物品镜面表面的污渍，呈现不锈钢表面的明净透光，特别适用于镜面不锈钢表面的清洁保养。

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The U.S. integrated steel business is dirty, cyclical and always under siege from foreign producers and nimble, low-cost U.S. minimill operators like Nucor Corp.

FORBES: Man of steel

Big black bags holding 250 pounds of dirty coveralls and uniforms are dumped from a rail system overhead into 450-pound steel washers big enough to scrub a small rhino.

FORBES: Dirty Laundry