The invention discloses an uninterrupted dual power supply changeover switch, which comprises an encloser, a contact on-offsystem and a mechanical transmission system.
本发明公开了一种无间断双电源转换开关,包括壳体、触头分合系统、和机械传动 系统;
2
The New York State parks system wants to turn off the falls on the American side to replace two 115-year-old stone bridges that allow pedestrians, park vehicles and utilities access to Goat Island.