职业案例包括铁加工和精密金属加工。

Career examples include ironworking and precision metal working.

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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。

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.

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她正在加工一大块铁。

She was working on a large piece of iron.

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