Each cross bar or row of holes in the roll controls a row of the pattern and mechanically determines which warp yarns (harnesses) will be raised and which lowered.是什么意思_Each cross bar or row of holes in the roll controls a row of the pattern and mechanically determines which warp yarns (harnesses) will be raised and which lowered.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句