Which invention was most important in revolutionizing the meat industry?
1)air brakes
2)knuckle couplers
3)the Pullman car
4)the refrigerator car
Answer:
4)the refrigerator car
Which invention was most important in revolutionizing the meat industry?
1)air brakes
2)knuckle couplers
3)the Pullman car
4)the refrigerator car
Answer:
4)the refrigerator car
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