[电] self and systems testing and checkout

zì xíng hé xì tǒng cè shì jí hé zhā ㄗˋ ㄒㄧㄥˊ ㄏㄜˊ ㄒㄧˋ ㄊㄨㄥˇ ㄘㄜˋ ㄕˋ ㄐㄧˊ ㄏㄜˊ ㄓㄚ