进厂前闭锁工厂

[经] pre-entry closed shop

jìn chǎng qián bì suǒ gōng chǎng ㄐㄧㄣˋ ㄔㄤˇ ㄑㄧㄢˊ ㄅㄧˋ ㄙㄨㄛˇ ㄍㄨㄥ ㄔㄤˇ