BS EN 60335-2-26 AMD11. Household and similar electrical appliances. Safety. Part 2-26. Particular requirements for clocks Ingestion-build-209208 This part of BS 9690

This part of BS 9690 is applicable to the use of the GWT method using the pulse-echo technique with the transducer mounted on the outside of pipes for which the testing is straightforward

there may be unpredictable interactions and care has to be taken when combining the assessment of these errors

Who is BS EN 3727 - Airframe bearings for aerospace applications for

specifies rules for designating steels by means of symbolic letters and numbers to express application and principal characteristics

BS EN 16907-3 provides best industry guidance that includes:

BS EN 60335-2-26 AMD11. Household and similar electrical appliances. Safety. Part 2-26. Particular requirements for clocks Ingestion-build-209208 This part of BS 9690