养护

Though the analysis of the concrete track crosstie dehiscence, a new maintaining method is provided.

介绍了混凝土轨枕伤损的类型及其原因，并推出了一种适合混凝土轨枕线路特点的作业方法。

This test use the fermental liquid of the caproic-acid filtering,filling and conserving mud,analyze the influence of the caproic-acid on the luzhou-flavor liquor.

验利用己酸菌淋、灌及其,使用前后对照分析己酸菌发酵对浓香型大曲酒的影响。