"Now oil the joints in my arms, " he said. And Dorothy oiled them and the Scarecrow bent them carefully until they were quite free from rust and as good as new.
稻草人小心地把它们弯曲着，直等到锈着了的地方十分自由，灵活得像新生的一样才罢手。
这个金属不会生锈。
Steel must be rust free and the work will benefit from a light sand-blast .
钢架不得生锈，这可以通过轻微抛丸处理来达到。
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