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Greentech International (Zhangqiu) Co., Ltd. / Greentech Industry (Jinan) Co., Ltd. has become one of most successful suppliers of blower and vacuum pump in China with more than 20 years experience in R&D and marketing. Our products range from roots blower,side channel blower,ring blower,liquid ring vacuum pump,water ring vacuum pump,vacuum pump, Air Suspension Centrifugal Blower, Maglev Turbo Blower.