Dispersants cut the oil as washing-up liquid cuts the grease on dishes, allowing oil on the surface to spread down into the water.
分散剂清除浮油的原理就如同洗涤液除去器皿上的油腻物一般，使海面的浮油沉入水中。
The presence of exogenous surface contamination, including dirt, grease, free iron from contact with steel tooling, and so forth, may interfere with the formation of the passive film.
外生的表面污染，包括：尘土、油脂、来自钢铁加工的游离铁等等，可以影响到钝化膜的生成。
In a long time stop, remove the pump and dry the parts and coat rust-proof grease on the processed surface.
长期停止使用时，应拆开水泵，将零件上的水擦干，在加工表面涂上防锈油保管好。
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