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DD CLC/TS 50131-7:2008 Alarm systems
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when a message is sent to a subscriber by a subscriber or nonsubscriber through direct messaging
This International Standard describes the stress optical method for determining the birefringence in glass
This standard generally applies to force-proving instruments in which the force is determined by measuring the elastic deformation of a loaded member or a quantity which is proportional to it
Guide to levels of competence required in laser safety Ingestion-build-58320 DD CLC/TS 50131-7:2008 Alarm systems1 Scope and object 1. 1 Scope This Guide has been prepared in order to provide information and guidance to employers and employees in organisations in which lasers are used. It is supplementary to the safety requirements specified in the EN 60825 series of standards on laser safety. The Guide outlines procedures for the management of laser hazards and defines levels of competence for those who work with laser equipment or who have responsibility for
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