To truly get the end with the backset tapered the same as the straight end, I can't use a straight edge to draw the whole line.(这真的使得弯曲的逐渐变细喝直的一头完全一样。我不能使用笔直划出全部线条。)
Resisting the balance backset current boiling point the ones that reduce and brake oil volatilize effectively.(搞平衡回流沸点，有效减少刹车油的挥发。)
The backset current extraction, ultrasonic-assisted extraction and microwave extraction were tested to select the optimum extraction and the quantitative analysis of specimen was made.(分别考察回流法提取法、超声波萃取法及微波萃取法。选择最优提取工艺，对样品进行含量测定。)
The noise of the fan is mainly consist of circumrotatory noise and backset noise based on the theoretical analysis.(首先基于风机噪声理论的分析确定了影响风机噪声源的主要因素是旋转噪声和涡流噪声。)
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