精品人妻一区二区,h片在线,被黑人掹躁10次高潮,香蕉在线视频99

Symbol [wind power] pitch pinion industrialization
     Gear machinery products is an important foundation parts. Transfer gear is a major form of machine power and movement. Compared with the belt, friction, hydraulic mechanical transmission, with power range, high transmission efficiency, transmission than accurate: long life, safe and reliable, so it has become indispensable to many machinery transmission parts. Gear design and manufacturing level will directly affect the performance and quality of mechanical products. Because of its prominent position in industrial development, so that the gear is recognized as a symbol of industrialization.

Links:
TV http://m.zysxjgy.com/products-detail.asp?cpid=347 wind ring gear
Non-standard gear custom http://m.zysxjgy.com/products-detail.asp?cpid=466