[经] item by item sequential sampling plan

zhú xiàng lián xù qǔ yàng fǎ ㄓㄨˊ ㄒㄧㄤˋ ㄌㄧㄢˊ ㄒㄩˋ ㄑㄩˇ ㄧㄤˋ ㄈㄚˇ