单词	鑽圓錐形之孔
释义	同Counter-sink
随便看	planned down time planned downtime planned economies planned economy planned emergency exposure planned impulse buying planned intervention planned issues planned issue transaction planned language planned load planned maintenance planned maintenance and repair planned movement formulation planned obsolescence planned operation planned order planned order error list planned order receipts planned order released planned order status planned outage planned outage factor planned outage hours planned outage state