watt second वाक्य

उदाहरण वाक्य

1. It was replaced by the Stroboflash IV that had four power setting that could be selected via a rotary top mounted switch : 1 / 4 ( 50 watt seconds ), 1 / 2 ( 100 watt seconds ), 3 / 4 ( 150 watt seconds ) and full ( 200 watt seconds ).