鋼鐵工業

钢 = 冈 + 钅 : Guy Fawkes (g) is looking for a steel (钢) well on a mound (冈) in front of the anglepod (ang1). Multiple times he sticks his golden harpoon (钅) into the earth until finally the liquid steel bursts out of the earth like oil out of a drill hole.

铁 = 失 + 钅 : Mother Teresa (ti) is looking for a new iron weapon (铁) to defend herself. So far she was using a golden harpoon (钅), but the gold is just too soft. Inside of the elevator (e3) she is searching a lost+found box with her golden harpoon for an iron weapon (铁).

铁 = 失 + 钅 : Mother Teresa (ti) is looking for a new iron weapon (铁) to defend herself. So far she was using a golden harpoon (钅), but the gold is just too soft. Inside of the elevator (e3) she is searching a lost+found box with her golden harpoon for an iron weapon (铁).

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.

I can't help but see a bullfrog in 业. Maud Younger finds that the climate in the elevator's bathroom are perfect for her new business: growing bullfrogs.