铅液输出有高位自流输铅液和铅泵输铅液两种方式选择，高位自流输铅液大大降低了铅渣生成量。
High head gravity flow and lead pump can be selected for conveying lead liquid, high head gravity flow can largely reduce lead residue.
洞穴中大多充满灼热的水，因而给利用工业泵在其中进行银、锌、铅等矿物的开采增加了难度。
Much of the complex would naturally be filled with scorching water, were it not for industrial pumps that facilitate the mining of silver, zinc, lead, and other minerals in the caves.
计量泵控制着输给浇注头的铅量，没有过量的铅返回铅锅。
A metering pump regulates the amount of lead to the pour lead with no excess lead return to the pot.
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