例句 /

Corundum is adopted for distributing valve. Mirror-surface treatment ensures good air-tightness and anti-friction. With a simple structure, it is easy for maintenance and long service life is thus expected.

Corundum is adopted for distributing valve. Mirror-surface treatment ensures good air-tightness and anti-friction. With a simple structure, it is easy for maintenance and long service life is thus expected.

分配阀采用钢玉、经镜面处理,密封好、耐磨,结构简单易于维护,使用寿命长。