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Tianchang TG turbine ventilation Co.,Ltd is the major manufacturer which contains designing,making and selling processions of the turbine roof ventilators.we have the I.E.code.our company is established in 1995,its name was "Tianchang Metal door and window factory"and "tianchang TG turbine ventilation factory".our company is in the advanced technology industrial area, which is very convenient to find.if it is needed ,you can visit our firm 's web www.tg-cn.com our products's despriction:All the parts of the turbine ventilators are finished by the professional machines and precious molding tools, they are assembled after check by theprofessional equipments.And the bearings are adjusted and designed by the enfineers from UBC company according to our ventilators requirements for low resistance and long usage lubricating oil so as to be sure the long usage and high delicacy Quality Description The top cover is finished by the large stretching machine so as to be its accuracy and beauty Theaxis is made of the stainless steel and it is checked by the number control of process to make sure its better running delicacy The bearing plate and the bracket which are made of the stainless steel are pressed only noce,they are possessed with the best accuracy,high delicacy and long usage The middle part which can change its angle on the roof is finished by the processional machine by only one time so that it is more convenient to adjust the angle The vanes are processed by hte processional machine only once to make sure their waterproof and intensity The inner structure is advanced by many times,so now it is possessed with better facility and long time usage The base plate is stretched successfully by one time,and the water will never leak