depurant

The two simple methods can be employed to check the performance of depurant uesed in the analysis of residual pesticide.

这两种方法可以方便地检查出农药残留分析中净化剂的性能。

JCQ depurant-muffler is adopted on 49ZQ engine using small rare-earth element balls as catalyst and took the method of quadrature frequency band optimization to opetmize the configuration parameters.

用于492Q发机的JCQ净化消声器采用稀小球为催化剂，用正交频带加权优化法优选消声器结构参数，取得良好的消声、净化性能。