It can be used in the laying of sewage, gas pipe or electric cable tunnel without opening the road surface, railroad or riverbed. It is of simple construction, easy operation and low cost.
它可不开挖跨路面、铁路和河流铺设下水道，煤气管和电缆管路等，结构简单、工作方便、施工费用低。
It can be used in the laying of sewage, gas pipe or electric cable tunnel without opening the road surface, railroad or riverbed. It is of simple construction, easy operation and low cost.
它可不开挖跨路面、铁路和河流铺设下水道，煤气管和电缆管路等，结构简单、工作方便、施工费用低。
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