INDEX

airplane duster, 26

asphalt spreader, 65

bailer, 34

baler, automatic, 26-27

beet digger, 42

bit, 69

blower, 28

boom, 9, 49, 51, 55, 74, 85

“box seat,” 22

bucker, 53

bulldozer, 45, 55, 57, 61, 67, 74, 77

bull wheel, 73, 74

cable rig, 72

catcher, 53

caterpillar, 45, 46, 60, 67, 68, 74, 77, 85

cats, 68

cement mixer, 65

chicken picker, 24-25

Machines at Work · 第 25 / 37 题