1 foot = 12 inches
1 inch = 1000 mils
1mil=25.4um
1mil = 1000uin mil, sometimes also into English silk
1um = 40uin (some companies call micro inch wheat, which is actually micro inch)
1oz = 28.35 g / SF = 35 microns (copper thickness)
H = 18 microns
4mil / 4mil = 0.1mm/0.1mm line width and line distance
1asd = 1 AMPS / square decimeter = 10.76 AMPS / square foot
1am = 1 ampere minute = 60 Coulomb, mainly used for precious metal electroplating, such as gold plating
1 square decimeter = 10.76 square feet
1 oz = 28.35 g, which is an imperial unit
1 gallon (Imperial) = 4.5 liters
1 gallon us = 3.785 liters
1kha = 1000 a / h
1 ampere hour = 3600 Coulomb
Specific gravity
Specific gravity = 145-sg
SG. Specific gravity (g / cm3) = 145 / (145 Baume degrees)
