例句與造句

1. Laminated magnetic cores are made of stacks of thin iron sheets coated with an insulating layer, lying as much as possible parallel with the lines of flux.
2. By the mid-1860s, the ambrotype itself was being replaced by the tintype, a similar image on a sturdy black-lacquered thin iron sheet, as well as by photographic albumen paper prints made from glass plate collodion negatives.
3. It's difficult to find thin iron sheet in a sentence. 用thin iron sheet造句挺難的