Terms containing code extension

Subject	English	Chinese
telecom.	code extension	代码扩充
telecom.	code extension announcer	代码扩充宣布符
space	code extension character	代码扩充字符 (计算机控制字符)
IT	code extension character	代码扩充字符
IT	code extension key	代码扩充键
tech.	graphic code extension	图形码扩展
tech.	graphical code extension	图形码扩展
IT	locking code extension character	锁定码扩充字符