cassette changer
... single cassette 单盒磁带,单卡,单磁... cassette changer 换片器 double cassette 双重暗盒 ...
record changer
... record autochanger 自动换片机 record changer 换片器 record disc 唱片 ...
film changer
... 换片暗盒 changing magazine 快换片盒 quick change magazine 换片器 cassette changer ; record changer ; film changer ...