Channel-Channel Alignment

Authenticity,Repairing the Old Like the Old

new-generation-old reservoir-old sealing formation

Old Day Embedded in Old Dictionary

old oil =old crude

old well in old field

Remain old appearances of old buildings in restora

repair the old as old

Bearer Channel， B Channel

C-Channel (Control Channel)

channel to channel adapter

channel-to-channel

channel-to-channel adapter

channel-to-channel adapter(CTCA)

channel-to-channel connection

connection， channel-to-channel

deep-water channel in the north channel

disease of one channel involving another channel

Speech channel Voice Channel