control level of emission 排放控制水平
The MCU is used to control emission and receiving of the ultrasound, and compute the oil-level.
采用单片机控制超声发射与接收，并经温度补偿后计算出油位，使检测具有高智能性。
The more intelligent can be obtained when using the MCU to control the emission and receive and to calculate the liquid-level.
采用单片机来控制超声波的发射与接收，并且计算出液位，使检测具有更高的智能性。
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