伤风 😵😩😷

in #zzan5 years ago

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

Sort:  

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!

Coin Marketplace

STEEM 0.20
TRX 0.13
JST 0.030
BTC 65248.25
ETH 3471.40
USDT 1.00
SBD 2.51