例句與造句

1. Multipole switches were common; some had perhaps as many as a dozen poles, but those were less common.
2. "' Double switching "', "'double cutting "', or "'double breaking "'is the practice of using a multipole switch to close or open both the positive and negative sides of a double insulation.
3. It's difficult to find multipole switch in a sentence. 用multipole switch造句挺難的