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.
You’ll get up to 40 minutes of run time, with two power modes: a standard mode for general cleaning and a Max mode for more intensive spots. It's lightweight and easy to manoeuvre, and it also converts into a handheld vacuum for cars, stairs, and upholstery.
，这一点在WPS官方版本下载中也有详细论述
（四）购进农产品时，除取得增值税专用发票或者海关进口增值税专用缴款书外，按照农产品收购发票或者农产品销售发票计算的进项税额，国务院另有规定的除外；
Can India be a player in the computer chip industry?