tape puncher

It analized the error during dealing with the data of "Reseaching Uniformly Retarded Rectilinear Motion"experiment,point out the best way on how to deal with the paper-tape experiment data.

对"研究匀变速直线运动"的实验数据处理过程进行了深入的误差分析,在此基础上指出了处理纸带实验数据的最佳方法。

Therefore, to improve the printing quality, to control the web tension accurately is of the most important.

卷筒纸印刷中影响印刷速度和印品质量的主要因素是纸带的张力,因此,要提高卷筒纸印刷质量,必须精确控制纸带张力,国外的卷筒纸印刷机全面控制系统发展较快,但国产印刷机张力控制的研究与国外相比有很大差距。

But it sometimes shows a false positive or negative reaction due to interference of its litmus paper with the urine chemicals, and also due to other factors such as operation errors in the course of examination.

随着尿液分析仪的普及 ,其简单、快捷的优点被人们所接受 ,但由于试纸带在测定过程中易受尿液中化学因素的干扰 ,且由于人们操作误差等诸多因素 ,造成假阳性、假阴性。