涵洞通道两侧、桥台背后等狭窄地点，用小型机械振动夯实。
Place like culvert sides, behind the abutment sites and so on, we use small mechanical to compact.
目前用的最广的两种生产装饰混凝土制品的方法是干料振动夯实法和湿料浇铸法。
The two most widely-used casting methods today are the "Vibrant Dry Tamp" (VDT) system and the "Wet Cast" method.
扼要阐述了弹性元件的特性及在振动夯实机械中的应用，较详细地介绍了弹性元件的设计方法及计算机辅助设计。
The characteristic of elastic element which is applied in vibration tamping mechanism is briefly stated, and the designing method of elastic element, as well as CAD is introduced.
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