Title: Kānchai khrư̄ang witthayu khamanākhom bǣp sangkhro̜ khwāmthī (synthesizer) læ kānmī læ chai khrư̄ang witthayu khamanākhom nai khāi Krom Kānpokkhrō̜ng dōi thūkto̜ng
Description: Use of radio as synthesizer in the Post and Telegraph Department of Thailand.