单项选择题 叮零智能视频门铃的工作湿度为()
A.10%~90%RH,无冷凝
B.10%~93%RH,无冷凝
C.20%~90%RH,冷凝
D.20%~30%RH,冷凝
A.10%~90%RH,无冷凝
B.10%~93%RH,无冷凝
C.20%~90%RH,冷凝
D.20%~30%RH,冷凝