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1.a disc with continuous grooves; formerly used to reproduce music by rotating as a phonograph needle tracked in the grooves.
带有连续的凹槽；以前的通过在凹槽内旋转唱针再现音乐的装置。收藏指正
2.After studying on the correlation of the injection rate, fuel pressure in the pipe and the needle valve lift, and analysing the amplitude of the first reflecting wave, the results obtained by this equipment are ready to compare with that by rotating cells method and ordinary Bosch method.
考察了喷油规律与油管压力、针阀升程的关系,分析了第一反射波的波幅问题,并将测试结果与用蜂窝法、Bosch长管法的测量结果进行了对比。收藏指正
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