王月英家的酱缸里只剩下一层缸底。
缸头和缸底的同一位置上均安装一接近开关，该两接近开关分别处于缸筒两端。
The proximity switches are arranged on the same positions of the cylinder head and the cylinder bottom, just on two ends of the cylinder barrel.
乳化液中有大量的漂浮杂质，在立柱缸底和阀腔，留有较多的煤粉、岩粒和铁屑。
A large number of floating impurities in the emulsion, and the valve chamber in the column bottom, left more coal, rock and iron tablets.
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