Switch to the Search TAB (reference Figure 9), click on the query statistic icon, and you can enter the window of the query statistic (illustrated in Figure 2).
转换到Search选项卡(参考图9)，单击Query statistic图表，然后输入查询数据的窗口(如图2所示)。
This article has made statistic and analyses on many types of flameproof button and switches used in coalmine, such as travel switch, limit switch, pull switch, and so on.
就煤矿井下现用的隔爆按钮以及行程开关、限位开关、打点器、拉线开关、井口开关等进行了统计、分析，针对使用中出现的问题提出了改进措施。
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