用PCF8583作为定时器，在由89c52构成的室内供暖计费系统中，实现预定时开关供暖阀门部分的功能。
It used the PCF8583 as timers to realize the function of prearranging the heating valve 's on-off time in the house heating expenses system composed of 89c52.
固定时可使用地热供暖托架在基础灰浆地板上用钉子固定。
Use saddles for piping to fix pipe driving nails into the foundation floor.
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