工件机壁孔之公差必须为H7，保证内外环较高同轴度。
The rabbet for install the outer must be H7 tolerance, ensure a high axiality.
为了减轻床身的重量和保证床身的刚度要求，设计了板壁孔结构。
To reduce the lathe-bed and assure its stiffness requirement, a batten wall pore structure is designed.
为了保证有足够的刚度，机床对板壁孔的形状、位置和大小都提出了相应的要求。
In order to assure adequate stiffness, the lathe has relevant requirements for the shape, location and size of the batten wall pore.
提出当井壁孔隙压力接近临界值时，井壁处于非稳定平衡状态，在有动力扰动的情况下，井壁因失稳而坍塌。
When the stress of wellbore is close to critical loads, wellbore is in the state of instability, and when dynamic disturbance is present, wellbore will collapse because of in…
提出当井壁孔隙压力接近临界值时，井壁处于非稳定平衡状态，在有动力扰动的情况下，井壁因失稳而坍塌。
When the stress of wellbore is close to critical loads, wellbore is in the state of instability, and when dynamic disturbance is present, wellbore will collapse because of in…
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