[经] agreement concerning scientific and technical cooperation

kē xué jì shù hé zuò xié dìng ㄎㄜ ㄒㄩㄝˊ ㄐㄧˋ ㄕㄨˋ ㄏㄜˊ ㄗㄨㄛˋ ㄒㄧㄝˊ ㄉㄧㄥˋ