请不要穿越中线。
Symmetry for the center line of the sieve.
与筛体中心线对称。
The center line of the flow care is partial to the inner side of annulus.
流核中心线偏离环空中心线，且偏向环空内侧。
Suddenly a semi truck crosses the center line and is heading right at you.
突然，一辆半卡车越过中线，迎面驶来。
This dimension must be at least twice the dimension from center line to handwheel.
这个尺寸必须至少为从阀门中心线至手轮距离长度的两倍。
To order, specify description and extension length from center line of valve to handwheel.
订购时，注明描述信息和从阀门中心线至手轮的加长长度尺寸。
To order, specify description and extension length from center line of valve to handwheel.
订购时，注明描述信息和从阀门中心线至手轮的加长长度尺寸。
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