中文字幕乱偷在线

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    2. Chainsaw origin
      2018-10-08

      Chainsaw, also known as "power saws," Andre Aspen by the Germans. Steele in 1926 invention, which greatly saves time spent cutting material and manpower. Chainsaw to power as the driving force for cutting wood, stone, steel and other cutting tools, the edge has sharp teeth. Break fixed and portable, tool steel blade is generally made of a circular, bar and chain, and other.


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      中文字幕乱偷在线

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