BS EN 131-2:2010 pdf free.Ladders Requirements, testing, marking. BS EN 131-2 Place the ladder laterally, with the longitudinal axis of the ladder in the horizontal position. The lower stile is to be fixed to the support so...
IEEE 450-1987 pdf free
IEEE 450-1987 pdf free.IEEE Recommended Practice for Maintenance, Testing, and Replacement ofLarge Lead Storage Batteries for Generating Stations and Substations. IEEE 450 items indicate conditionsthat,if allowed to persist for extended periods,can reduce battery life. They do not...