单词	粮（糧）食袋
释义	同Haversack
随便看	coupling drive coupling dye coupling effect coupling efficiency coupling efficiency between laser and pump modes coupling efficiency of coupling efficiency of--step-index fiber coupling-- electron coupling element coupling equation coupling facility coupling factor coupling factor of directional coupler coupling filter coupling flange coupling flux coupling frame coupling frequency coupling function coupling gain of coupling gain of--step-index fiber coupling-- gradient coupling gratings coupling guide coupling head