重工業

重 = 千 + 里 : Chantal Chicken set a new world record in the engine's kitchen. She repeatedly rode a space elevator up and down, one thousand times in total. For setting the world record she got a sunflower.

重 = 千 + 里 : This one looks like a space elevator. The two top strokes are the heavens, the two bottom strokes are the earth and the part in between is the space elevator.

重 = 千 + 里 : Julian Giant Squid installed a space elevator in the engine's bathroom, and now he wants to find out how heavy the load can be. For his first trip he loads 1000 times 1 kilo, and to celebrate the grand opening, he brought a sunflower.

工 = 二 + 丨 : Mnemonic symbol: a steel beam, since 工 looks like the cross section of a steel beam.

Gitta Giraffe (gu) is working a shift in front of the engine ((e)ng1). Her job is to melt dinosaur bones (丨) so that they can be disposed off easily. To melt the bones, she is shorting a huge capacitor (二) with a steel beam (工) which consequently heats up to a bright glow. Using the glowing hot steel beam she can melt the dinosaur bone easily.

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.