【机械工程】间隔滚珠，带有松散间隔滚珠的滚珠轴承

tray spacing

lattice spacing

line spacing selective printer

variable base-line interferometer【天】;variable-spacing interferometer【天】

positive feed with pawl and ratchet of character-spacing mechanisms inselective printers

plant spacing

spacing discharge tube, spacing of electron-optical or ion-optical arrangements

spacing arrangement, electron-optical, ion-optical