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2. Reversing drum mixer - Wikipedia

   en.wikipedia.org/wiki/Reversing_drum_mixer

   Mixing blades are mounted on the inside surface of the drum and as the drum rotates the blades mix by lifting and dropping the materials during each rotation. [1] Once the materials are sufficiently mixed the rotation of the drum is reversed and the blade arrangement pushes the concrete through to the discharge end of the mixer.

3. Arcing horns - Wikipedia

   en.wikipedia.org/wiki/Arcing_horns

   Arcing horns protecting bushings on a distribution transformer. Arcing horns form a spark gap across the insulator with a lower breakdown voltage than the air path along the insulator surface, so an overvoltage will cause the air to break down and the arc to form between the arcing horns, diverting it away from the surface of the insulator. [3]

4. AOL Mail

   mail.aol.com

   Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

5. Open channel spillway - Wikipedia

   en.wikipedia.org/wiki/Open_channel_spillway

   Chute spillways carry supercritical flow through the steep slope of an open channel. There are four main components of a chute spillway: [1] The elements of a spillway are the inlet, the vertical curve section (ogee curve), the steep-sloped channel and the outlet.

6. Electrical discharge machining - Wikipedia

   en.wikipedia.org/wiki/Electrical_discharge_machining

   Electrical discharge machining (EDM), also known as spark machining, spark eroding, die sinking, wire burning or wire erosion, is a metal fabrication process whereby a desired shape is obtained by using electrical discharges (sparks). [1]

7. Traveling block - Wikipedia

   en.wikipedia.org/wiki/Traveling_block

   A traveling block is the freely moving section of a block and tackle that contains a set of pulleys or sheaves through which the drill line (wire rope) is threaded or reeved and is opposite (and under) the crown block (the stationary section).