在头盔的边缘两侧近耳朵边缘各有一用于放音的喇叭，两喇叭导线接线端分别通过导线和小型收音装置相连接。
There is audio speaker near the edge of the both sides in the helmet, the junctions of two speakers' leads are connected with the small radio device through leads respectively.
电源开关和电源盒接线端及小型收音装置的电源接线端通过导线相连接构成电路回路；
The power switch, the junction of the power supply box and the junction of power of the small radio devices are connected forming a circuit loop through leads.
电源开关和电源盒接线端及小型收音装置的电源接线端通过导线相连接构成电路回路；
The power switch, the junction of the power supply box and the junction of power of the small radio devices are connected forming a circuit loop through leads.
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