My company is the production of sieve (filter pipe), sieve, water cap, gas cap, slotted sieve, downhole tools of the professional manufacturers, products have been sold to port, Daqing, Shengli, Jidong, Liaohe, North China, Xinjiang , Central Plains and other oil and Beijing, Wuhan, Shenyang, Xi'an and other cities as well as Sudan, the United States. In June 2003 passed the ISO9001 certification. (more>>)