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1·A caustic or corrosive substance or drug.

苛性剂，腐蚀剂：腐蚀性，苛性的物质或药物。

2·NO gas , wapor or dust that may severely affect the insulation of contact box, no explosive or corrosive substance.

无严重影响触头盒绝缘的气体、蒸汽、灰尘及其它爆炸性和腐蚀介质的场所。

3·The dimethyl sulfate, a substance that is used to produce industrial dyes and pesticides, can be corrosive and irritative to human skin, eyes and the upper respiratory tract.

硫酸二甲酯是用来生产燃料和农药的物质。它对于人类的皮肤，眼睛和上呼吸道系统具有腐蚀和刺激作用。

4·It is aimed at removing extremely toxic substance resulted from application of mercury in existent apparatus, and providing a non-toxic, non-corrosive and high-performance mercury substitute.

其目的在于消除现有仪器中使用汞产生的剧毒，而提供一种无毒、无腐蚀、高性能的汞替代物。