FWD describes the forward message path and rev describes the reverse message path; the latter is optional.
fwd描述转发消息路径,rev描述反向消息路径;后者是可选的。
Forward: Press FWD key, conveyor forward, the top of the green indicator light.
前进:按下fwd键,传送带前进,上方绿色指示灯亮。
Forward: Press FWD key, conveyor forward, the top of the green indicator light.
前进:按下fwd键,传送带前进,上方绿色指示灯亮。
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