There is a little window in the cassette case so that you can see the tape.
盒式音像带上有个小窗，能看见里面的磁带。
That was the case with VCRs, video cassette recorders. During the nineteen eighties, people had two choices: VHS and Betamax.
比如vcr -卡带式录像机的例子，20世纪80年代，人们有两种选择：VHS制式和betamax制式。
80's Retro Mix Cassette Tape Gadget case.
80年代复古式混音磁带小套。
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