【计】 peer layer communication
coequal; coequality; coordination; equivalence; on a par; on an equal basis
parity
【机】 equivalence
layer; region; stage; story; stratum; tier
【计】 layer
【医】 coat; lamella; lamellae; lamina; laminae; layer; strata; stratum
communitcate by letter; correspond; correspondence
【计】 communication