Oxygen cylinders acetylene filling gas after having out of the field marking why

Yes, the cylinder must have a clear periodic inspection mark and the management code of the filling device, the color of the bottle should be in line with tsgr0006 "Gas Cylinder Safety Technology Supervision Regulations" and other standard requirements. After checking the safety management network learned that all cylinder suppliers must hold the provincial quality supervision department issued in the validity period of the "cylinder filling license", hold a legal business license, and must undertake to the safety of the cylinder is fully responsible.