After the Kongdong reservoir water hole plate gate rebuild into a cone valve, the stilling basin, model test was conducted.

对崆峒水库输水洞平板闸门改建为锥形阀后的消力池进行了模型试验研究。

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The bottom of the hole plate is separated from a closed state when draining, and the water flow can flush and exhaust the precipitate.

排水时，将孔板底部脱离封闭状态，水流可将沉淀物冲起排出。

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Once the impurities in the water or the cleaning solution sink into the holes of the hole plate, the majority can sink at the bottom and stop in order to avoid the secondary pollution.

水或洗涤液中的杂质一旦沉入孔板的孔中，其大部分就会沉入底部并且静止在那里，避免了二次污染。

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The sample comes from a hole about 2.5 inches deep drilled on Feb. 8 in a flat plate of sedimentary bedrock that the space agency managers have named "John Klein" in memory of a Mars Science Laboratory deputy project manager who died in 2011.

WSJ: Rover on Mars Extracts First Rock-Core Sample