在一些表中，功能设为不同步影响扫描。这意味着这些功能不是打a描的一个阶段。例如，VO模块扫描发生在CPU扫描的输入或者输出阶段。然而，I/O中断通常与扫描不同步并且会中断当前进程的任何功能。
Sporlan Thermostatic Expansion Valve Y744 SFE 1-1/2
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Litton Printer Carriage Assembly Repair Kit
