词汇	gravity feed lubrication
释义	gravity feed lubrication 🌏重力润滑
随便看	education of ethnic languages education of ethnic minorities education of examination education of higher nursing education of higher polytechnic colleges education of exchange students education of executive leadership education of farmers education of fee-free but occupation-fixed education of female education of female children education officer education of filial piety moral education of fine arts education of fine arts innovation education of fine personality education of fire control Education of foreign languages education of foreign students education of formation education of forming the mind education of gentlemen education of geography education of girls education of good faith