| 摘要 |
A memory chip of an unpolarised magnetic connector connected with an unpolarised magnetic connector, characterised in that the output of the unpolarised magnetic connector (L) is connected with a diode (D1) of a transoptor (Top), whereas the phototransistor (T1) thereof is connected with the input of a transistor amplifier (T2) with a clock input (T) of a flip-flop (K), whereas the control input (D) of the flip-flop (K) is connected with a motion direction selection system of an excavating unit, whereas the output (Q) of the flip-flop (K) is connected through an amplifier (T3) with an operating flip-flop (P) shunted with a diode (D2).<IMAGE>
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