单词	牙料皮
释义	同ENAMEL
随便看	packet layer protocol，plp packet layout packet lead address packet length packet level error control packet-level procedure packet level protocol packet-level synchronization packet lifetime control packet link packet message delay packet message switching packet mode packet-mode dte packet-model terminal packet mode operation packet mode terminal packet monkey packet multiplexer packet multiplexer，pmx packet multiplexing technique packet-net system interface packet-net system interface，psi packet network packet network architecture