QJ 1421.4-1988 Metal Hot Working and Surface Treatment Safety Inspection Rules for Security Checks

QJ 1421.1-1988 Security inspection guidelines, general provisions QJ 1421.2-1988 Security Checking Details and Safety Management Inspection Details QJ 1421.3-1988 Metal Cold Processing Safety Inspection Rules for Security Checks QJ 1421.5-1988 Welding Safety Inspection Rules for Security Checks QJ 1421.6-1988 Safety Inspection Regulations - Safety Inspection Regulations for Lifting and Transportation QJ 1421.7-1988 Safety inspection rules for substation and distribution safety inspection rules QJ 1421.8-1988 Low-voltage electrical safety inspection regulations for security checks QJ 1421.9-1988 Safety Inspection Regulations for Boilers QJ 1421.10-1988 Safety Inspection Regulations for Steel Pressure Vessels QJ 1421.11-1988 Security Check Guidelines: Dangerous Goods Security Check Guidelines QJ 1421.12-1988 Radiofrequency radiation safety inspection rules for security check procedures QJ 1421.13-1988 Safety Inspection Rules - Safety Inspection Rules for High-altitude Work

QJ 1421-2006