伤风 😵😩😷

in zzan •  last year 

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

Posted using Partiko Android

Authors get paid when people like you upvote their post.
If you enjoyed what you read here, create your account today and start earning FREE STEEM!
Sort Order:  

!shop

Posted using Partiko Android

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!