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Liquid Ring Vacuum Pump has many series, such as 2BV series liquid ring vacuum pump, 2BE series liquid ring vacuum pump, 2SK series liquid ring vacuum pump, SK series liquid ring vacuum pump, SZ serie
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Compared with traditional lighting, connecting LEDs to the grid is a whole new world. The LED needs direct current (DC) to light up, and the alternating current (AC) will not work. AC modules are also
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