iron-clad galvanometer

例句：

1. 1.The iron-clad galvanometer is used to measure the resistance of wires.
   铁包覆式电表用于测量导线的电阻。
2. 2. The iron-clad galvanometer was invented by a famous scientist named Dr. Smith.
   铁包覆式电表是由一位名叫史密斯的著名科学家发明的。
3. 3. The iron-clad galvanometer has been widely used in various industries for its accuracy and reliability.
   铁包覆式电表因其准确性和可靠性而被广泛应用于各种行业。