Imports of cut-off valve stem and valve seat sealing surface perpendicular to the axis.

进口截止阀的阀杆轴线与阀座密封面垂直。

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To investigate the parameters of parallel cut blast without empty holes, an advanced numerical method is used to study the explosion effect of charge in hole perpendicular to a free surface.

为了考查无空孔直眼掏槽爆破参数，采用数值模拟方法研究单自由面垂直炮孔的爆炸作用问题。

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Core plugs are ordinarily cut perpendicular to the axis of the core or parallel to the axis, called horizontal and vertical plugs, respectively, when cut from a vertical wellbore.

岩心栓一般从平行或垂直于岩心轴的方向切下来，从垂直井眼方向切取的岩心中取出的分别叫做水平岩心栓、纵向岩心栓。

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