LST EN 61300-3-21-2002 Fibre optic interconnecting devices and passive components. Basic test and measurement procedures. Part 3-21: Examinations and measurements. Switching time and bounce time (IEC 61300-3-21:1998) was changed to LST EN 12593-2015 Bitumen and bituminous binders - Determination of the Fraass breaking point.
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