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slack off
gen. 放松; ; 变〔放〕慢; 减速
interntl.trade. 偷工; 怠工
sail.ships 放松绳子
slack-off
dril. 放松; 下放钻具; on...把重量下放到......上
oil 下钻遇阻
slack off: 6 phrases in 2 subjects
Drilling5
Technology1