GB/T 16915.4-2003 Switches for household and similar fixed-electrical installations--Part 2:Particular requirements--Section 3: Time-delay switches(TDS)
2019GB/T 16915.4-2019 Switches for household and similar fixed-electrical installations—Part 2-3: Particular requirements for time delay switches (TDS)
2003GB/T 16915.4-2003 Switches for household and similar fixed-electrical installations--Part 2:Particular requirements--Section 3: Time-delay switches(TDS)