... Simple structure, free from trouble.5. Hardened by high-precision synchronous drive gear, imported bearings, long life, low noise ... .6. High precision rotor dynamic balance, dynamic balance through rigorous testing, high ... .7. Standardized product with strict quality control. Changzhou Guozhen Machinery co., LtdTel: +86-519-81199289Fax: +86-519-86537839Mob:+86 ...