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。
Built nearly a century ago to provide power to lumber and paper mills in the town of Port Angeles, these dams blocked access to upstream spawning beds for six species of salmon.
这些大坝建于近一个世纪以前，是为洛杉矶港的木材和造纸厂提供电力的，大坝阻断了6种鲑鱼的上游产卵地。
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。
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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