Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Gas Co Ltd
Original Assignee
Nippon Gas Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nippon Gas Co LtdfiledCriticalNippon Gas Co Ltd
Priority to JP15144477ApriorityCriticalpatent/JPS5483578A/en
Publication of JPS5483578ApublicationCriticalpatent/JPS5483578A/en