The study on the movability of the face - contacted blocks in overlying strata above the longwall face in datong 大同采场覆岩面接触块体可动性判定研究
2.
Because of the fixity and non - movability of the urban land , the urban land market is characterized by its separability and zonality 由于城市土地的固定性和不可移动性，城市土地市场具有分割性和区域性的特点。
3.
The cyclones with short cone are used for crude grading of minerals with heavier specific gravity in gold mines , sand gold mir . es and sulphur ore mines and have such advantages as small ground occupation , high capacity , high operating flexibility , low energy consumption and high movability etc 短锥分选旋流器用于金矿、砂金矿、硫化矿等比重较大的矿物的粗选作业，具有占地面积小，处理能力大，操作弹性大，能耗低，可移动性强等优点。
4.
Compared with conventional lan , the wlan has a lot of advantages , such as movability , convenience to access , confidentiality , antijamming , easy to maintain and low cost . now , the most widely used wlan technology is based on ieee 802 . 11 standard . however , the traditional security methods , for example wep , are proved not insecure 与传统的有线网络相比,无线局域网wlan ( wirelesslan )具有可移动性、用户接入灵活、保密性强、抗干扰性好、维护方便以及良好的性价比等优点,现在应用最广泛的就是基于ieee802 . 11标准的无线局域网技术。
