Stampings in auto industry. In China these stampings are mainly produced in automobile factories, tractor factories, aircraft factories and other big factories.

汽车行业的冲压件，在我国，这部份冲压件主要集中生产在汽车厂、拖拉机厂、飞机制造厂等大厂；

youdao

His 2009 Number One hit "Big Green Tractor" is Number 10 on the year's Top Country Songs list.

VOA: standard.2009.12.22

These folks come in with their big tractor-trailers full of music gear and stage equipment and all that other stuff--this is some thing I didn't learn in the cable business.

FORBES: In My Own Words

For the 2008 campaign, the Straight Talk (as the McCain staff calls it) began as a state-of-the-art behemoth, as big as a tractor-trailer.

NEWYORKER: On the Bus

For Zynga, which also owns CityVille, Zynga Poker, Mafia Wars and Words With Friends, virtual tractor sales are big business.

FORBES: How Zynga, Facebook and Groupon's Go-To Auditor Rewrites Accounting Rules