介绍一种以pic 16f877单片机为核心的智能型位置遥控系统，它能快速可靠地实现对船舶位置的串级控制，主从机串行通信部分采用了RS 42 2标准。
A kind of intelligent position telecontrol systems of the ship based on PIC16F877 is introduced in this paper. RS-422 is adopted in the serial communication.
他们操作的遥控装置可以改变截煤机的方向、位置和速度，这台德国产的截煤机可以沿着一道300米宽的煤面来回进行切割。
They work with remote control devices that change the direction, position and speed of a German-made cutting machine that slices back and forth along a 300-metre-wide coal face.
如果它们对应操作的按钮能在类似的位置、外观相同而且感觉也一样，那么，操作这些遥控器该有多简单？
How much easier would they be to operate if buttons of comparable operations were located at similar locations, looked the same, and felt the same?
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