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电话插头（PJ-777和PJ-778型） 3芯 单芯 双芯

2014-06-20

Plugs, Telephone (Types PJ-777 and PJ-778) 3 Conductor, Single, Double
电话插头（PJ-777和PJ-778型）3导线 单、双

2019-06-04

PLUGS, TELEPHONE (TYPE PJ-777, PJ-778) 3 CONDUCTOR, SINGLE DOUBLE (SUPERSEDING MIL-P-642/13A)
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1988-10-31