circuit d
| intercom
| circuit D | |
| stat. | D circuit |
| intercom | |
| gen. | talkback |
| commun. | intercom system; intercommunication system; key system |
| telecom. | key telephone system; press-to-talk system; two-way telephone system |
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| D circuit | |||
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circuit d : 710 phrases in 50 subjects |