安装靠背释放装置的环。

Install loop for backrest release.

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转接环上的电子触点在安装正常的情况，连接到数码相机的电子触电上。

Its electronic touch point connects to the same point on digital camera under normal condition.

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灯壳面盖环为标准尺寸，适合各种灯具的安装装配；

Lamp shell surface cover ring for standard size, suitable for all kinds of lamps installation;

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灯壳面盖环为标准尺寸，适合各种灯具的安装装配；

Lamp shell surface cover ring for standard size, suitable for all kinds of lamps installation;

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