英语语法分析

The cooling characteristics of a quenchant SST102 were investigated.

对SST102淬火剂的冷却特性进行了探讨。

In recent years, the application of PAG quenchant is being increasingly extensive.

近年来，pag淬火剂的应用日益广泛。

According to the properties requirement and structure characteristics of the vehicle hub axle, the F-2000 quenchant was selected.

根据汽车轮毂轴管的性能要求和结构特点，选择F 2000淬火液进行淬火。