gf germanium content fiber含: keep in the mouth锗: germanium光纤: fibre-optical氧化锗光纤: germanium oxide optical fiber含锗的: germanic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:含锗光纤，即可在微信中查询翻译
