Design of Self-Centering Expansion Clamp of the Gland Nut in the Lead-in Device of Rubber Pipe Cable for Mine Explosion-Proof Electric Equipment是什么意思_Design of Self-Centering Expansion Clamp of the Gland Nut in the Lead-in Device of Rubber Pipe Cable for Mine Explosion-Proof Electric Equipment在线翻译_英语_读音_用法_例句