Remove scale, in the process of assembly parts surface oil, in case of rust.
去掉氧化皮，装配过程中零件表面涂上油，以防锈蚀。
Clean water, oil, rust, dust and other filths before spraying the paint on the surface.
喷涂前应先把被涂物表面之 水份、油脂、铁锈、灰尘及附着污物清除干净。
The surface should be a CLEAN, TIGHT RUST.
表面应干净，锈层紧密。
The surface should be a CLEAN, TIGHT RUST.
表面应干净，锈层紧密。
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