Finally, close the input stream, flush the output stream, and if it was a pipe, close it with the pclose function.
最后，关闭输入流，清空输出流，如果输出流是管道，则用pclose函数关闭它。
The listen and close methods open and close an input pipe, respectively.
listen和close方法分别打开和关闭输入管道。
Check any pipes that run close to outside walls. Put some fiberglass insulation or rockwool between the pipe and the wall to help keep the cold away from the pipe.
检查靠近外墙的所有管路，并在管路和墙体之间包覆玻璃钢保温层或石棉，以确保低温远离管路。
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