短語詞組短語sulfur r hexafluoride tracer 六氟化硫示蹤原子microvesicle sulfur hexafluoride 六氟化硫微泡sulfur hexafluoride termination 六氟化硫終端high purity sulfur hexafluoride 高純六氟化硫sulfur hexafluoride &n 六氟化硫sulfur hexafluoride tracer 六氟化硫示蹤原子sulfur hexafluoride sf sf6 氣體sulfur hexafluoride gas 六氟化硫氣體 返回 sulfur hexafluoride