‰·ò–¼ ç‘ã“c(Chiyoda)
’n@–¼ ŽRŒ§ŒSç‘ã“c’¬
[“xi‚j -1
‰·@“xiŽj 21
—¬@—Ê(l/min) 40
pH 6
òŽ¿ ’PƒŽãRnò

Geological Survey of Japan, AIST, 2004