It can carry all classes of low-temperature test for the engine, tractor, agricultural vehicle of medium sized or below, and other products.

可承检发动机、拖拉机农用运转车、中型以下车辆的低温性能试验，同时可为其它产品进行各类低温性能试验。

youdao

The technology isn't new-a patent for a hydrogen internal combustion engine was issued in 1928, and a 20hp fuel-cell tractor was demonstrated in the late 1950s.

FORBES: Magazine Article

During the hearing the HSE said the tractor's starter motor had been faulty for at least two months and staff had been starting the engine by using a screwdriver or spanner to short the connection.

BBC: Leicester