Synchronous belts of XL, L, and H sections are available in dual-drive sections, termed DXL, DL, and DH.是什么意思_Synchronous belts of XL, L, and H sections are available in dual-drive sections, termed DXL, DL, and DH.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句