A power-driven screen is preferable. 4-3 Mill,hand-driven or Wiley type(see 5.4.1) 44 Mason jar,for keeping sample air-tight. 4.5 Shovel or scoop for use in taking samples of chips
A power-driven screen is preferable. 4-3 Mill,hand-driven or Wiley type(see 5.4.1) 44 Mason jar,for keeping sample air-tight. 4.5 Shovel or scoop for use in taking samples of chips