The sulphuric acid ate into the parts of the metal where the coat of paint had peeled.

硫酸腐蚀了这块金属上涂层剥落的地方。

Introduces the structure, characteristics of LGQ type gauger, and the situation of measuring water and sulphuric acid in SSP production.

介绍LGQ型计量器的结构、性能，以及在过磷酸钙生产中用于水和硫酸计量的情况。

By the carbonification degree in the concentrated sulphuric acid, the mineral wax, such as paraffin wax added can be determined.

根据蜂蜡中的烃类在浓硫酸中可被炭化，加入的石蜡等矿物蜡不被炭化来测定此类掺杂物。

It has discovered that trace dimethyl glyoxime can sensitivly catalyize the discoloration of dimethyl yelloue by potassium bromate in sulphuric acid.

研究发现，在硫酸介质中，超痕量二甲基乙二醛肟能灵敏地加速溴酸钾氧化二甲基黄褪色的指示反应。