在大型高炉工况条件下，解析了3种富氧操作方式下主要冶炼参数的变化规律，以及高炉下部高温区煤气通道状况。
For large blast furnaces, the change of main operation parameters are analyzed and gas channels in high temperature and lower part of blast furnace an discussed for three modes.
许多厨房、厕所位于楼盘的暗角，不易被人看到，并且靠近下水管道、煤气管道，这些地方小小的通风窗口夜间很容易成为入室盗窃的通道。
Many kitchens and toilets which are located in the hidden corners of apartment and close to and water pipes or gas pipelines can not be seen easily.
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