1.Monomotor bogies , where both axles of the bogie are driven by a single motor , often encounter torsional resonances, which lead to periodic longitudinal slip.
4.Hermione opened her mouth, perhaps to tell Ron exactly how to use the Curse of the Bogies, but Harry hissed at her to be quiet and beckoned them all forward.
5.“Ooh, you look much tastier than Crabbe and Goyle, Harry, ” said Hermione, before catching sight of Ron's raised eyebrows, blushing slightly, and saying, “Oh, you know what I mean—Goyle's potion looked like bogies.”
6.A quiet, silent, rich, happy place; a narrow crack cut deep into the earth; so deep, and so out of the way, that the bad bogies can hardly find it out.