When we take "the series connection of the single machine and doublepillar" it needs precise shifting between two pillars, and time-shearing operation.
在采用单机双柱串联方式时，则需要精确的柱间切换，分时操作。
2
During the construction of double-arched tunnel, the role of center pillar is of great importance.
在连拱隧道施工中，中隔墙扮演着至关重要的角色。
3
The metro station of "triple-arch, double-storey and double-pillar" has been built in our country by means of shallow buried subterranean excavation method.