free shipping Genuine Transmission network engineering maintain manual signal communication network technique teaching material transmission network Of technology evolution optical cable SDH DWDM OTN PTN GPON network maintain Basics book People mail
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ISBN number: 9787115416704title: Transmission network engineering maintenance manualauthor: nothingprice: 49.00 yuantitle: Transmission network engineering maintenance manualFormat: 16Is it a suit: noName of Publishing House: People's Posts and Telecommunications Publishing House
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