Assertion: tv's channel | /r/CapableOf | utilize standard 3-mil 78-rpm groove
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text: Five years later, Bell Labs was experimenting with a two-channel Lateral-Vertical system, where the left channel was recorded laterally and the right channel was recorded vertically, still utilizing a standard 3-mil 78-RPM groove, over three times larger than the modern LP stylus of the late 20th Century.