Evil aggressors also in trouble, force us to identify the "Nanjing Treaty" and the unequal treaties, called the people to help them to hard labor, digging coal mine, giving them as cattle and horses.
可恶的侵略者还趁火打劫，逼我们鉴定《南京条约》等不平等的条约，叫老百姓帮他们做苦工，挖煤矿，给他们当牛做马。
The paper researchs the principle of protective seam mining, hydraulic slotting method and executing-digging technology to avoid risk of coal-gas outburst, and its practices in coal mine.
通过分析近距离保护层开采、水力掏槽法及边抽边掘技术防治煤与瓦斯突出原理及实践应用，从而有利于煤与瓦斯突出矿井选择合理有效的防突技术。
The miner is digging the coal mine.
矿工叔叔在挖煤。
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