datum line

A line of punch positions parallel to the Y datum line of a punch card.

和卡片的Y基准线平行的一行穿孔位置.

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The datum of the recovery time are clarified to be in line with the requirements of the design criterion by choosing the proper parameters for the throttle gate and the annular gap.

当对节流孔以及环形缝隙两变量赋予合适的数值时，得到的空载恢复时间数据符合设计规范的要求。

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Use to indicate a datum target area, line or point.

用于指示基准目标区域、线条或点。

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Objective To establish femoral shaft datum line based on frontal and lateral X ray images.

目的根据正位和侧位的X线图像建立股骨骨干的三维基准线.

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Rotating laser is a kind of portable apparatus providing datum plane or datum line for some engineering application.

激光扫平仪是为一些工程应用提供平面或直线基准的一种便携式仪器。

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At the same time, the dynamic changing law of the side force of tail wheel was analysed as well as the effect of different inclination between the horizontal bars and the designed datum line on the initial value of the side force of the tail wheel.

分析了尾轮侧向力的动态变化规律及左右下拉杆与设计基准线的不同夹角对尾轮侧向力初值的影响。

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If the element being tested with a tolerance requirement is a contour line or surface, point the arrow and datum symbol to the contour line or surface, and keep it away from the dimension line.

当具有公差要求的被测要素为线或平面时，将指引线箭头和基准符号指在线或平面上，且必须与尺寸线错开。

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