单词	nickels
释义	同nickel
随便看	helical gear pair helical gears helical gear-- screw gear helical gear; screw gear helical groove helical guide helical instability helical--instability helical line helical--line helically helically finned tube economizer helically tothed wheel helically welded tube helically-wound helically wound stellerator helical manometer helical milling helical mixer helical model of communication helical motion helical--motion helical mount helicalorbit beta-ray helical orbit beta-ray spectrometer