自我们国家的改革开放以来，随着人民生活水平的日益提高，一股住房的装璜热在全国范围内悄然而至。我们稍加留心，就能发现，近年来，在我市好多住宅建筑中都可见一种叫“无烟灶台”的装置。仔细观察该装置，它只是在厨房相应的外墙面上开个约宽１ｍ，高２ｍ的洞，由几块事先? Since the reform and opening up of our country, with the ever-increasing living standards of the people, the decoration of a house has been quietly spread across the country. With a little care, we can see that in recent years, a lot of residential buildings in our city have seen a device called a “smokeless stove”. Observe the device carefully. It only opens a hole about 1m wide and 2m high on the corresponding outer wall of the kitchen.