The control card may indicate that the program is on the master system tape or on CARDS.
控制卡可以指出程序是在主系统带上还是其他卡片上。
2
Master: (1) A plate for a duplicating machine or small offset machine. (2) Original tape, disc, film, etc from which copies will be made.
纸版，（2）原版样：（1）复印机或小型柯式机用的印版。（2）作复制用的原版磁带，磁带，菲林等。
3
Based on PWM technique, the energy from battery discharges return to the mastertape of DC, which has the advantage transmitting energy through two directions and realizes energy callback.