When we take "the series connection of the single machine and double pillar" 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。
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.
我国已成功地用浅埋暗挖法修建了西单“三拱两层双柱”式地铁车站。
Double cylinder four-pillar automatic balance construct, guaranteeing the same depth of each cutting point.
双油缸、四柱自动平衡连杆结构，保证每一个裁断位置裁断深度完全相同。
Double cylinder four-pillar automatic balance construct, guaranteeing the same depth of each cutting point.
双油缸、四柱自动平衡连杆结构，保证每一个裁断位置裁断深度完全相同。
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