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2. Leaf blower - Wikipedia

   en.wikipedia.org/wiki/Leaf_blower

   A leaf blower, commonly known as a blower, is a device that propels air out of a nozzle to move debris such as leaves and grass cuttings. Leaf blowers are powered by electric or gasoline motors. Gasoline models have traditionally been two-stroke engines, but four-stroke engines were recently introduced to partially address air pollution ...

3. List of vacuum tubes - Wikipedia

   en.wikipedia.org/wiki/List_of_vacuum_tubes

   YD1336 – 1.8 kW, Air-cooled, UHF power triode. YD1342 – 30 MHz, 530 kW, Water-cooled RF power triode. YD1352S (8867, DX334) – 5 MHz, 2 kW, Water-cooled Neotron, a gridless field-effect tube where a magnetically focused electron beam is modulated by varying the voltage of a gate electrode surrounding it.

4. Vacuum tube - Wikipedia

   en.wikipedia.org/wiki/Vacuum_tube

   A vacuum tube, electron tube, [ 1][ 2][ 3] valve (British usage), or tube (North America) [ 4] is a device that controls electric current flow in a high vacuum between electrodes to which an electric potential difference has been applied. The type known as a thermionic tube or thermionic valve utilizes thermionic emission of electrons from a ...

5. Vacuum pump - Wikipedia

   en.wikipedia.org/wiki/Vacuum_pump

   Vacuum pump. The Roots blower is one example of a vacuum pump. A vacuum pump is a type of pump device that draws gas particles from a sealed volume in order to leave behind a partial vacuum. The first vacuum pump was invented in 1650 by Otto von Guericke, and was preceded by the suction pump, which dates to antiquity.

6. Hawaii's state primary is here: These are the races to watch.

   www.aol.com/hawaiis-state-primary-races-watch...

   Hawaii’s state primaries will conclude Saturday, with polls closing at 7 p.m. local time (1 a.m. EDT Sunday). Registered voters can participate in any party’s primary, and results are expected ...

7. Tesla's energy business is growing — and it could be company ...

   www.aol.com/finance/teslas-energy-business...

   Tesla’s overall gross profit was $3.7 billion in Q1, with a gross margin of 17.4%, which was down from 19.3% a year ago. The drop in gross margin was due to Tesla’s EV price cuts, which were ...