每个USB集线器都包罗上游端口(Upstream Port)和下流端口(Downstream Port)。上游端口是面向USB主机(HOST)标的目的举行毗连的,而下流端口是面向USB设备举行毗连的。
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Maximum queues per port upstream 上行端口最大队列数
The lumber and paper mills in Port Angeles also block access to upstream spawning beds.
安吉利斯港的木材和造纸厂也封锁了通往上游产卵场的通道。
Helical line (port) is in upstream of tangential port, minimizes the deterioration came from outflow of helical line, and obtains the best support of tangential port airflow.
螺旋线(气道)位于切向气道的上游,以使来自螺旋线外流的恶化减至最小,并获得切向气道气流的最佳支持。
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