Demolition material are the advantages of pipecleanerpipe cleaning, water flow rate can be relatively low, may be suspended.
拆出料管法的优点是管道清洗较干净,水源的流速可以较低、可以暂停。
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Knowing how to redirect data as stdin or stdout, how to use the pipe, and how to use operators in UNIX helps you write more powerful scripts with better error trapping and cleaner logic.