Portland cement, wire rod, steel rebars, porcelain tiles, doors.
Copper oxide, bismuth, diammonium phosphate, phosphoric rock, silver, cobalt sulphate, sodium molibdate.
Sensors proximity, switch inductance sensors, capacitive sensors, photoelectric sensors, magnetic sensing sensor
Minerals like quartz, feldspar, bauxite, zinc ash, gum like damar batu
Motorcycles, steel, fruits