偷拍自怕亚洲视频在线观看

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        Pulley of a brief introduction
        Nov 16, 2016

        Pulleys, belongs to the disk hub parts, generally larger, manufacturing process generally consists mainly of casting and forging. Generally larger size designs for the casting method, material is generally cast iron (cast performance), rarely cast steel (steel casting of poor performance), generally smaller, can be designed to forge, material for steel. Pulley is mainly used for long distance transmission power situations, such as small diesel engine output, agricultural vehicles, tractors, automobiles, mining machinery, mechanical equipment, textile machinery, packaging machinery, lathes, forging, small horsepower motor power drive dynamic delivery of agricultural machinery, air compressors, speed reducer, gear box, generator, cotton gin, and so on.


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        偷拍自怕亚洲视频在线观看
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