PanLinx
русский
rus-000
правило знаков
普通话
cmn-000
正负术
國語
cmn-001
正負術
Hànyǔ
cmn-003
zhèngfùshù
English
eng-000
convention of signs
English
eng-000
law of signs
English
eng-000
rule of signs
English
eng-000
sign convention
PanLex
