Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Okabe Masaaki,Revision of Standards Regarding Certified High Pressure Gas Establishments,Journal of Japan Society for Safety Enginennring,05704480,Japan Soceiety for Safety Engineering,2007,46,1,30-38,https://cir.nii.ac.jp/crid/1390282681220690560,https://doi.org/10.18943/safety.46.1_30