A new device for measuring run out error of needlevalveseat′s cone surface is proposed. The calculating and estimating methods of the error are also described in the paper.
推出了一种新的针阀体座面圆跳动误差测量装置，介绍了误差的计算与评定方法。
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A manual or automatic, conical needle in a seatvalve that can be changed to alter the amount of fluid flow through it.