您要查找的是不是：
- The coal briquette penetrability is important in researching the rule of protected stratum penetrability changes during the period of protecting stratum mining. 型煤的渗透性对研究保护层开采过程被保护层的透气性变化规律有重要作用,为此设计了型煤渗透性测试系统。
- TEST RESEARCH ON COAL SEAM PENETRABILITY DYNAMIC CHANGING LAW BY FAR-DISTANCE PROTECTING STRATUM MINING 远程保护层开采上覆煤层透气性动态演化规律试验研究
- protecting stratum mining 保护层开采
- Keywords mining engineering;far-distance protecting stratum;similitude material model;penetrability;coal and rock deformation;coal and gas outburst; 采矿工程;远程保护层;相似材料模型;透气性;煤岩变形;煤与瓦斯突出;
- They netted the fruit trees to protect them from birds. 他们用网覆盖住果树以使其免遭鸟害。
- He went heels over head into buying mining stock. 他购买了矿业股票，做事真鲁莽。
- How can we protect our computer files? 我们怎样才能保护我们的计算机数据？
- This area depends on the mining industry. 这个地区以采矿业为经济基础。
- They represent each society stratum. 他们代表各个社会阶层。
- He tried gold mining, pearling and fur trapping. 他尝试过淘金，采珍珠和猎兽皮。
- She was engaged in protecting wild birds. 她致力於保护野生鸟类的工作。
- He was trained there as a mining engineer. 他在那里被培养成一名采矿工程师。
- A plastic cover protect the computer. 这台计算机由一个塑料防护罩盖着。
- It's our duty to protect the saplings. 保护树苗是我们的责任。
- They do not constitute a separate class or stratum. 知识分子和青年学生并不是一个阶级或阶层。
- A piece of armor protecting the throat. 护喉甲用来保护咽喉的盔甲
- In case of flood, the dam can protect us. 在发洪水的时候，大堤可以保护我们。
- The broker claimed that mining shares had moved up to a new level. 经纪人声称，矿业股票的行市已上升到新的水平。
- A law was passed to protect alien property. 通过了一项法律保护外国侨民的财产。
- In situ measurements verify the above by observing the confined water intruding up into the coal floor,the protective strata,before mining.This paper considers the secondary stress as the conditi... 底板的原位应力测试发现承压水在采前出现了向上入侵的现象，二次应力给导升的发展提供了条件，递进导升是突水机理之一。
