heavy machinery; large machinery; plant
Refers to large-scale industrial machines, construction equipment, or factory installations. 'Plant' is used in industrial contexts.
This factory introduced heavy machinery and increased productivity.
Several pieces of large machinery are lined up at the construction site.
重機 is a more common, shorter term for heavy machinery, especially construction equipment. 大型機械 is broader and can include factory plant.
Compound of 大型 (large-scale) + 機械 (machine).