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.(這真的使得彎曲的逐漸變細喝直的一頭完全一樣。我不能使用筆直劃出全部線條。)

Resisting the balance backset current boiling point the ones that reduce and brake oil volatilize effectively.(搞平衡回流沸點，有效減少剎車油的揮發(fā)。)

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.(分別考察回流法提取法、超聲波萃取法及微波萃取法。選擇最優(yōu)提取工藝，對樣品進行含量測定。)

The noise of the fan is mainly consist of circumrotatory noise and backset noise based on the theoretical analysis.(首先基于風(fēng)機噪聲理論的分析確定了影響風(fēng)機噪聲源的主要因素是旋轉(zhuǎn)噪聲和渦流噪聲。)