permanent grade的意思|示意

Strong magnetic separation machine adopts permanent magnet department multistage choose don't design, stable work, concentrate grade can make a large quantity of also can be guaranteed.

强磁选机采用永磁磁系多级选别设计、工作稳定、精矿品位能使处理量大时同样得以保证。

Today is a unforgettable day. It will leave permanent fragrance to the 37 students of Grade 6.

今天是一个令人难忘的日子，她将在六年级37位同学心中留下永久的芬芳！

Permanent violet RL is high-grade organic pigment of carbazole dioxathion.

永固紫RL系二恶嗪类的高档有机颜料。