Na2S2O3

ๅˆฅๅใƒใ‚คใƒ

ใจใฃใฆใ‚‚้›‘้ฃŸใ€€ใŒใŠใƒผ(ใ€Œใƒปฯ‰ใƒป)๏ฝข

Works (3)