Fatigue tests should be carried out to simulate 10 years' service, on the same assumption.
Abrasion tests should be carried out on any coated or mating surfaces.
All relevant British standard tests must be carried out.
If electric motors are to be used, they must be tested.
The trimmers should be tested on an AQL basis with a level of 2.5 for compliance with the performance requirements specified, and also for the requirements given in "Environment."