单词	输送带鼓轮
释义	同输送带鼓轮 -- 卷筒
随便看	double natured double-natured doublenatured double nebula double-neck guitar double-neck guitjo double needle telegraph double negation double negation -- double denial double negation ; double denial double negative double negatives double nephropathy doubleness doublenesses double nickel double-nickel double nickel salts double nip machine double nipple double noncentral f distribution double non-return valve double non-return valve{=double check valve} double normalizing double-normal solution