... two function. At each end of the cylinder, there is a shock. This cylinder take advantages of the QGB Series: the body ... with CNC milling and turning machines, CNC Lathes, etc. 3. Quality Certificates: ISO9001-2000, ISO9001-2008 Quality Assurance System, ... parts, engineering goods, etc.5. Quality control following 3 phases of thorough inspection, first-off inspection, during-processing inspection, ...