1 foot=12 inches

1 inch inch=1000 mils

1mil=25.4um

1mil=1000uin mil, sometimes also in English

1um=40uin (some companies refer to micro inches as wheat, but they actually refer to micro inches)

1OZ=28.35 grams per square foot=35 microns

H=18 microns

4mil/4mil=0.1mm/0.1mm Line width Line spacing

1ASD=1 ampere per square decimeter=10.76 amperes per square foot

1AM=1 ampere minute=60 coulombs, mainly used for precious metal electroplating such as gold plating

1 square decimeter=10.76 square feet

1 ounce=28.35 grams, which is in English units

1 gallon (imperial)=4.5 liters

1 gallon US=3.785 liters

1KHA=1000 ampere hours

1 ampere hour=3600 Coulombs

proportion

Baume degree=145-145/specific gravity SG

SG. Specific gravity (g/cm3)=145/(145 Baume degrees)