... 下降气流 downflow ;downwind 下降沿 negative-going edge 下降深度指示器 load-lowering height indicator ...
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negative going edge 负沿
Applying a negative-going trigger pulse simultaneously to RESET and TRIG during the timing interval discharges C and reinitiates the cycle, commencing on the positive edge of the reset pulse.
应用一个负的触发器脉冲在一个定时周期内来同时复位和触发，这样使电容器C放电并且重新初始化一个循环，从复位脉冲的正边开始启动。
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