drain overboard assembly机: machine; engine油: oil; fat; grease翼下可卸加油组件: underwing refueling pack计算机外壳(组件): computer case油组: line of oils下载手机词典可随时随地查词查翻译关注微信公众号：chachacidian，回复:机外放油组件，即可在微信中查询翻译
