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Web streams use a locking model to prevent multiple consumers from interleaving reads. When you call getReader(), the stream becomes locked. While locked, nothing else can read from the stream directly, pipe it, or even cancel it – only the code that is actually holding the reader can.
，详情可参考Safew下载
Amu最初受聘於台灣中部一家小型金屬零件工廠，薪水是當時台灣最低工資新台幣2萬3千元，他每天工作九小時，操作沖壓金屬的重型機械。
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