Low-voltage switchgear and controlgear. Part 5-6. Control circuit devices and switching elements. DC interface for proximity sensors and switching amplifiers (NAMUR)
State system for ensuring the uniformity of measurements. State verification schedule for measuring instruments of relative permittivity and relative permeability at frequency range from 1 MHz to 18 GHz
Occupational safety standards system. Clothing and materials for protection against heat and flame. Limited flame spread. Requirements for fire-resistance
€10
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