triple eccentric butterfly valve

• 三偏心蝶阀

triple eccentric butterfly valve的用法和样例：

例句

1. Based on the theory analysis above-mentioned, according to the given parameters, we designed the three dementions figure of the tri-eccentric butterfly valve.
   基于上述的理论分析，由已知参数设计出了三偏心蝶阀的三维图形。