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2. 9 of the Best Leaf Blowers to Clean Up Your Yard in a Hurry - AOL

   www.aol.com/9-best-leaf-blowers-clean-140000576.html

   The most expensive leaf blowers tend to have gas-powered engines and can cost more than $200, plus the price of gasoline. ... Best Leaf Blower Battery: Greenworks 2411902 Cordless Leaf Blower .

3. Our Editors Tested the Very Best Leaf Blowers You Can Buy - AOL

   www.aol.com/lifestyle/test-very-best-leaf...

   From gas- to battery-powered, handheld to backpack, these leaf blowers passed our tests. When the leaves start falling, these machines will whoosh them away. From gas- to battery-powered, handheld ...

4. Blast The Fall Foliage Off Your Lawn With The Best Backpack ...

   www.aol.com/best-backpack-leaf-blowers-clear...

   X-Series PB-7910T Gas-Engine Backpack Leaf Blower. Echo’s yard machines rarely lack for power, but the PB-7910T backpack gas engine leaf managed to exceed expectations, maxing out with an air ...

5. Annual fuel utilization efficiency - Wikipedia

   en.wikipedia.org/wiki/Annual_fuel_utilization...

   The annual fuel utilization efficiency (AFUE; pronounced 'A'-'Few' or 'A'-'F'-'U'-'E') is a thermal efficiency measure of space-heating furnaces and boilers.The AFUE differs from the true 'thermal efficiency' in that it is not a steady-state, peak measure of conversion efficiency, but instead attempts to represent the actual, season-long, average efficiency of that piece of equipment ...

6. 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.

7. Glassblowing - Wikipedia

   en.wikipedia.org/wiki/Glassblowing

   A stage in the manufacture of a Bristol blue glass ship's decanter.The blowpipe is being held in the glassblower's left hand. The glass is glowing yellow. As a novel glass forming technique created in the middle of the 1st century BC, glassblowing exploited a working property of glass that was previously unknown to glassworkers; inflation, which is the expansion of a molten blob of glass by ...