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在数字式仪器、仪表中,由于开机后分频、计数器状态是随意的,因此在正式工作之前首先要给分频、计数电路复零.所以不少仪器面板
In digital instruments, meters, because the frequency after the boot, the state of the counter is random, so in the formal work first to give the frequency, counting circuit zero. So many instrument panel