The upper end axis and screw on cylinder body accord with NAMUR standard ,it is for installation of feedback device of valve supply and valve locator.是什么意思_The upper end axis and screw on cylinder body accord with NAMUR standard ,it is for installation of feedback device of valve supply and valve locator.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句