spare charge of fire extinguisher备用: reserve; spare; alternate; b ...灭火剂: extinguishant; fire extingui ...通用灭火剂: multi-purpose extinguisher灭火器用灭火剂: fire extinguisher agent化学泡沫灭火器用灭火剂: agent for chemical foam fire extinguishers下载手机词典可随时随地查词查翻译