The back board is provided with a bore, and the lamp cap extends out form the bore.
在背板上设置有孔，所述灯头从所述孔伸出。
The lamp cap can effectively avoid the loosening and falling-off of the pin, and the safety is high.
这种灯头能够有效避免销钉的松动与脱落，安全性高。
The lamp cap is connected with the lamp holder. The lamp shell and the lighting tube are arranged under the lamp holder.
灯头与灯座相连，灯座下设有灯壳和灯管，灯管设在灯 壳内；
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