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525P4S Gas Pole Saw. Husqvarna makes some of the best chainsaws around, and that includes pole saws. With a 25cc gas engine powering a foot-long cutting bar, this pole saw is capable of taking ...
A polesaw (also pole saw or giraffe saw) is a saw attached to a pole or long handle that is used for pruning tree branches that are beyond arm's reach. [1] [2] A polesaw allows its user to cut high branches without the use of a ladder. [3] Polesaws can be manual or motorized.
A modern cant hook. A log driver using a peavey. A cant hook or pike or a hooked pike is a traditional logging tool consisting of a wooden lever handle with a movable metal hook called a dog at one end, used for handling and turning logs and cants, especially in sawmills.
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A sally saw is a portable, motorized saw created by the Cummings Machine Works in 1945 [1] [2] for limbing and bucking trees. A sally saw comprises an engine, an annular saw blade driven by a gear adjacent to the rim, and a drive shaft. [3] Like a String trimmer or Motorized Pole Saw, the drive shaft runs through a tube, which serves as the ...
The HART Communication Protocol (Highway Addressable Remote Transducer) is a hybrid analog+digital industrial automation open protocol. Its most notable advantage is that it can communicate over legacy 4–20 mA analog instrumentation current loops, sharing the pair of wires used by the analog-only host systems.
Hart's first inversor, also known as Hart's W-frame, is based on an antiparallelogram.The addition of fixed points and a driving arm make it a 6-bar linkage. It can be used to convert rotary motion to a perfect straight line by fixing a point on one short link and driving a point on another link in a circular arc.
A ten-blade saw demonstrated by FirstEnergy in 2017. An aerial saw is a saw which is flown through the air. The aerial saw may also be known as a helicopter aerial saw.. Large aerial saws are flown by helicopter to trim trees in remote locations when they overgrow power lines, pipelines or other infrastructure.
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