Mnemonic symbol: a chocolate factory. Charlie Chaplin (ch) is overjoyed to see that in the anglepod's living room (ang3), a small chocolate factory (厂) is for sale. He buys it, shaves his mustache, grows his hair a bit and renames himself to Willy Wonka to live in the chocolate factory.
工
=
二
+
丨
:
Mnemonic symbol: a steel beam, since 工 looks like the cross section of a steel beam. In front of the engine ((e)ng1), Gitta Giraffe (gu) is doing some hard work: She's stacking a capacitor (二) on a dinosaur bone (丨) on a capacitor (二). She's not very successful, but then she gets the idea to use steel beams (工) as support.