冄

二 = 一 : Mnemonic symbol: a capacitor, because the two strokes remind me of the symbol in electrical drawings. Albert Einstein (Ø) is experimenting with a capacitor (二) in the space station's bathroom (Ø4). He finds that it's uncomfortable to discharge a capacitor using two flutes (一).

冂 = 丨 + ㇆ : Kind of looks like a map. Zeus found a secret map that tells the location of a golden dinosaur bone in front of the engine, so he took a plough and digged up everything. He actually found a couple of dinosaur bones, but not a golden one.