SCHNEIDER ELECTRIC / TELEMECANIQUE
蜂鸣器, Harmony XVB, 连续性, 间断性, 90dB, 48VDC, 48VAC, 15mA, IP66, 70mm扩展深度
SQUARE D BY SCHNEIDER ELECTRIC
警钟单元, 蜂鸣器, 90DBA, 48V