1) a surface roughness Ra of the outer liner and the positioning cylindrical bearing surface is not more than 1.6um.2) Cylinder locating flange end face perpendicularity axis Cylinder mirror face is not less than 5 precision. Swan air compressor. Exhibits and theoretical engagement pay kissing profile, is run-in period. During this period, pay gradually from somewhat less engaging into better paid engagement, mutual non-interference engagement ultimately pay swan _ Xingchang Air compressor Taiwan Machinery (certified) by the Qingdao-compressor _ Swan Chang Pneumatic Machinery Limited. Qingdao Xingchang Pneumatic Machinery Co., Ltd. (www.xckyj.com) is the leader in Qingdao, industry-specific equipment, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. In Xingchang Pneumatic Machinery leadership with the staff warmly welcome all inquiries negotiations to create Xingchang Pneumatic Machinery better future.