汽车技工

汽 = 气 + 氵 : The Queen of Hearts (qi) conducts an experiment in the space station's bathroom (Ø4). She attached an empty balloon (气) to a water bottle (氵) and uses a lighter to make the water boil. Subsequently the water becomes water vapor (汽) and fills the balloon, enabling the queen to estimate the vapor volume.

车 = 七 + 十 : Charlie Chaplin (ch) is parading in a cabriolet (mnemonic symbol for 车) in front of the elevator (e1), because he wants to establish his new cult. Like all successful leaders, he takes the carrot-and-stick approach: In one hand he's waving with a seven-branched laser sword (七), in the other one he's waving with a cross (十).

技 = 扌 + 支 : Joan of Arc (ji) is gaming in the space station's bathroom (Ø4). Although she types on the keyboard using a branch (支) and moves the mouse using a toy claw (扌), she still has enough skill (技) to own everyone.

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.