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2. Leaf blower - Wikipedia

   en.wikipedia.org/wiki/Leaf_blower

   Some units called blower vacs, can also suck in leaves and small twigs via a vacuum, and shred them into a bag. Leaf blower vacuum. Leaf blowers are a source of controversy due to their adverse impacts such as operator injury, including hearing loss, particulates air pollution, noise pollution, and ecological habitat destruction. [2]

3. Inch of mercury - Wikipedia

   en.wikipedia.org/wiki/Inch_of_mercury

   Inch of mercury (inHg and ″Hg) is a non-SI unit of measurement for pressure. It is used for barometric pressure in weather reports , refrigeration and aviation in the United States . It is the pressure exerted by a column of mercury 1 inch (25.4 mm) in height at the standard acceleration of gravity .

4. Centrifugal fan - Wikipedia

   en.wikipedia.org/wiki/Centrifugal_fan

   Figure 1: Components of a centrifugal fan An external motor belt driven inline centrifugal fan discharging inline to the exterior of a building through a duct. Unlike non-inline/non-concentric impeller casing design with a cutoff blade above, the concentrically symetric cylinder casing and impeller geometry of inline type redirects the outflow around so that it is parallel to the inflow of gases.

5. High voltage - Wikipedia

   en.wikipedia.org/wiki/High_voltage

   The general public may consider household mains circuits (100 to 250 VAC), which carry the highest voltages they normally encounter, to be high voltage. Voltages over approximately 50 volts can usually cause dangerous amounts of current to flow through a human being who touches two points of a circuit, so safety standards are more restrictive ...

6. Vacuum cleaner - Wikipedia

   en.wikipedia.org/wiki/Vacuum_cleaner

   A hand-powered pneumatic vacuum cleaner, c. 1910. An early electric-powered model is also shown. The first vacuum-cleaning device to be portable and marketed at the domestic market was built in 1905 by Walter Griffiths, a manufacturer in Birmingham, England. [13]

7. Vacuum ejector - Wikipedia

   en.wikipedia.org/wiki/Vacuum_Ejector

   A vacuum ejector, or simply ejector, or aspirator, is a type of vacuum pump, which produces vacuum by means of the Venturi effect.. In an ejector, a working fluid (liquid or gaseous) flows through a jet nozzle into a tube that first narrows and then expands in cross-sectional area.