For the medium sand system of the low ammonia nitrogen, by shortening HLC, the removal effect of the system is significantly improved.

对中砂的中低氨氮进水系统，通过缩短水力负荷周期，会使去除效果得到明显改善。

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Properties of the green sand and the surface quality of the casting may be decreased due to the resin sand of cold box cores entering the green sand system.

冷芯盒树脂砂进入湿型砂系统会使湿型砂性能和铸件表面质量下降。

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The active and dead bentonite contents in green sand system have great effect on the sand properties, but it is very difficult to measure them in actual shop.

型砂系统中的有效膨润土和失效膨润土含量对其性能有很大影响，而生产中对这两个参数的检测比较困难。

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He has extended the shoppers parking initiative at Ann Place until the new year, and changed the payment system at Sand Street.

BBC: High rents mean independent shops 'unable to trade'

The system can sanitise the waste of ten people in two hours, leaving only sand and fresh(ish) water behind.

ECONOMIST: Monitor: Flushed with pride | The

The gates which were used to keep the channels clear of sand and silt were removed and buried when the National Rivers Authority replaced the gates with a new flood protection system in 1981.

BBC: Hayle to display its old sluice gates