BDD58防爆电笛(ⅡB)
传声隔爆结构
.外形美观 传声效率高.
■Features
.The shell is cast with aluminum alloy
.Surface sprayed
.Mith beautiful appearance and high efficient sound transmission





■型号含义 ■Model Meaning









■外型举例　■Outline example











■主要技术数据 ■Main Technical Parameters

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