graded reach meaning in English

冲淤均衡段
均衡河段

This series product adopt revions - labyrinthian strctre , they have performance of water - proof and dust - proof , the protection grade reaches ip65
本系列产品为迷宫式防水结构，具有良好的防水、防尘性能，防护等级为ip65 。
The products can withstand the corrosion of strong acid , strong acid , strong alkali , salt , anti - corrosion is f2 , protection grade reaches ip65
本产品抗强酸、强碱、盐腐蚀，防水、防尘，防腐等级为f2 ，防护等级为ip65 。