# TimeoutError: drain_requests never sees "closing"
All this is packaged in a .59-inch chassis that weighs just over four pounds. While the ProArt P16 starts at $2,799, or $100 less than the Samsung Galaxy Z Trifold, the bells and whistles in the model I reviewed gets you up to an eye-watering $3,999.，这一点在WPS官方版本下载中也有详细论述
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The problem gets worse in pipelines. When you chain multiple transforms — say, parse, transform, then serialize — each TransformStream has its own internal readable and writable buffers. If implementers follow the spec strictly, data cascades through these buffers in a push-oriented fashion: the source pushes to transform A, which pushes to transform B, which pushes to transform C, each accumulating data in intermediate buffers before the final consumer has even started pulling. With three transforms, you can have six internal buffers filling up simultaneously.，详情可参考wps下载
00 00 - 0x0 (0) bytes of request extension information