伤风 😵😩😷

[bitcast]

伤风 😵😩😷

3 ways to calibrate ORP meter

1. Quinhydrone
2. Ferrous cyanide + Ferric cyanide
3. pH buffer (- 59.1 mV for each pH unit below pH 7)

预测

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Comments

[zzan.hmy]

@bitcast님, steemzzang은 여러분을 환영 합니다.

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[botfolio]

!shop

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[teamcn-shop]

Hi~ bitcast!

@botfolio has gifted you 1 SHOP!

Currently you have： 3 SHOP

^{View or Exchange SHOP Please go to steem-engine.com.}

Are you bored? Play Rock,Paper,Scissors game with me!