The conditions of fluorine pollution in surroundings from minor brick-tile kilns in the area of fluorosis have been investigated.
本文对地氟病区家庭砖瓦窑造成环境氟污染进行了调查。
It also provides the brick-tile industry the optimum parameters for atomized jet vacuum pump and the method of designing efficient jet vacuum pump.
并为砖瓦行业提出了确定液气射流真空泵的最优参数及设计高效液气射流泵的方法。
Starting from the historical duty of developing new century's brick-tile industry, analysing the four couple contraction faced by the Guizhou brick-tile industry .
从新世纪砖瓦工业的历史责任出发,分析了贵州砖瓦工业面临的四组矛盾;
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