养护

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

介绍了混凝伤损的类型及其原因，并推出了一种适合混凝线路特点的养护作业方法。

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.

本实验利用己酸淋窖、灌窖及其养护窖,使用前后对照分析己酸对浓香型大曲酒的影响。