The test results show that the apron can reduce back flow at the dam toe, and the piers can obviously diminish river bed scouring near the scour resistant wall.

试验结果表明：护坦减轻了下游纵向围堰左侧坝趾处的回流淘刷，隔流墩明显减轻了防冲墙附近河床的冲刷，确保了坝基和下游纵向围堰的安全。

youdao

Turn on back wash drainage valve (V-4) and air scour valve (V-2). Air scour lasts for a moment.

将反洗排水阀(V - 4)，空气洗净阀(V - 2)置于[开]，进行空气清洗并持续一段时间。

youdao

The coal washing plant steam boiler with high and new technology can effectively avoid the back wall by high temperature gas scour damage, safe and reliable to use.

水洗厂燃煤蒸汽锅炉用了高新技术可以有效的避免后墙受高温烟气冲刷破损，使用起来安全可靠。

youdao

Players can build their own castles, fill them with traps, monsters, and loot and then sit back while other players come to scour their levels in a mighty quest for epic loot.

FORBES: The Mighty Quest For Epic Loot