所有修整边料传送回铅锅。
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.
锅内设有铅液传感器，根据液面的高低控制铅锭加料机构自动加铅锭进入铅锅。
The machine is equipped with lead liquid sensor in the pot, and feed lead ingot into pot automatically according to liquid level;
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