The acids in the food begin to attack and dissolve the metal lining of the can, and one of the by-products of this chemical reaction is hydrogen gas.
食品中的酸性物质开始溶解罐的金属内层，这种化学反应会产生氢气。
Adding a back lining at one side of the porous metal material is an effective and workable way to improve its sound absorption properties.
而在多孔金属材料一侧添加背衬是一种提高吸声性能的有效可行的方法。
Glassed steel reaction vessel is a sort of equipment for chemical engineering by coating a glass lining on metal body.
搪玻璃反应釜是一种由玻璃衬层和金属基底材料复合在一起的化工设备。
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