The site try test proved that these laws are of specified help to managing excavating face roof, it simplifies process of managing excavating face roof.
经现场的工业试验证明，这些规律对工作面的顶板管理具有一定的帮助，简化了工作面的顶板管理过程。
I want to get out and test myself in real markets, 1 haggling face to face with hardened traders.
我想到外面真实的市场检验自己的实力，与冷酷的商人面对面砍价。
I want to get out and test myself in real markets, 1 haggling face to face with hardened traders.
我想到外面真实的市场检验自己的实力，与冷酷的商人面对面砍价。
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