zinc protector वाक्य

उदाहरण वाक्य

1. Humphry Davy travelled on the Comet to Norway to test his zinc protectors for ships'copper bottoms in the summer of 1824.
2. Due to delays in proceeding with the border project, the British Admiralty asked him in the meantime to determine the longitude of various European locations, such as Madeira, with the help of chronometers, for which the " zinc protectors for ships'bottoms.