This paper introduces a expansion method which by means of PLC output, uses 2 SSRs to expand output point. It also gives LAD program.是什么意思_This paper introduces a expansion method which by means of PLC output, uses 2 SSRs to expand output point. It also gives LAD program.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句