Ningbo Maosheng Pneumatic Machinery Co., Ltd.is a manufacturer specialized in the manufacturing of filtering elements and silencers, and the company has passed the ISO9001 quality system certification earlier than other companies in the same industry; moreover, the company is a council member unit of pneumatic products of China Hydraulics Pneumatics & Seals Association, and it is fixed unit of railway ministry in china, and it is a growth-type enterprise in Jiangbei District in Ningbo City. The company was established in 1980 and it currently boasts of production factory buildings of more than 10,000 m2, and the professional and technical management personnel totals 1/3 of the whole staff and is capable of independent design, development and production. The perfect management and advanced equipments are the guarantee of high-quality products, and the company has been adhering to the development objective of "building an internationally famous manufacturing base of filtering elements and silencers" to achieve the quality objective of "excellent products-Maosheng′s permanent pursuit". After more than 30 years of development, the image of Maosheng can be seen everywhere. Maosheng leaves its footprints on the exhibitions in many East Asian countries and the industry exhibition in Hannover, Germany. Meanwhile, the company′s products are not only well sold in China, but also exported to Europe, America, East Asia and other regions. The company is one of China′s enterprises that export largest quantities of filtering elements and silencers at the earliest time, and the company enjoys a good reputation and higher status among the enterprises of the pneumatic industry of filtering elements and silencers.