[经] quality control and reliability

zhì liàng guǎn lǐ hé kě kào xìng ㄓˋ ㄌㄧㄤˋ ㄍㄨㄢˇ ㄌㄧˇ ㄏㄜˊ ㄎㄜˇ ㄎㄠˋ ㄒㄧㄥˋ