lower tank meaning in English

下部收庥器
下水箱
下箱

Shell manhole series shall be set on lower tank shell course for people and going out of the tank . the rainforcing plate of manhole is out of socpe supply . you want . acorrding to user drawing , our company can manufacture any type of the products user want
罐壁人口装于油罐下部，人可以由此进入，本产品出厂时不带加强版，如需其他标准或非标人孔，只需提供标准和纸图，我公司即可生产。