隔板可以是实心的。或在其中央有一个孔。
The spacer ring can be solid or it can have a hole in the center.
本实用新型提供了一种配合使用的螺丝和螺丝刀，所述的螺丝包括开有一字槽的螺丝头和有螺纹的螺杆，在所述的一字槽中央有一定位孔；
The utility model provides a screw and a screw driver matching with it. The screw comprises a slotted screw head and a screwed screw bolt, and a positioning hole is arranged at the center of the slot.
利用通用的微电极夹持器在其抽吸负压的侧管上方钻一斜孔直通夹持器中央管腔。
An oblique hole through the glass pipette holder above the lateral hole for cell seal suction is drilled, through which a microcatheter o.
底座封闭于槽孔，其顶面中央设有供掣动件及抗扭弹簧套设的凸轴，并设有供以热熔性固着剂固定钢珠的穿孔；
The center of the braking piece is provided with the through hole which is sheathed on the convex shaft and the top face is provided with an upright shifting piece.
有时孔口应偏移，因此，他们不直接正对焊盘中央。
Sometimes aperture openings need to be offset so they are not centered directly over pads.
一摩擦片，叠置于衔铁上，中央具连轴块孔；
A friction plate with a hole for connecting piece of axle is superposed on the armature.
一摩擦片，叠置于衔铁上，中央具连轴块孔；
A friction plate with a hole for connecting piece of axle is superposed on the armature.
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