提前

This paper introduces the principle of injection timing advance, transmission mode of timing gear, calculation formula of timing advance and its adjusting steps.

重点介绍了喷油提前角的提前原理，点火正时齿轮的传统动模式，提前角的计算公式及其调整步骤，从而真正达到了简洁实效的目的。

The predict accuracy of manufacturing models based on data after adjusting is 93.1 % , 94.4 % , 94.4 %.

调整失真财务数据后,提前三年、提前二年、提前一年模型的信用预测准确率分别为93.1% 、 94.4%和94.

Through this research, the test found the following conclusions: The hardening time and zero time of concrete with salts advanced.

本文以收缩变化率最大时刻作为自收缩零点，试验通过研究发现：掺盐后混凝土硬化提前，自收缩测试零点提前。