noun
construction machinery; construction equipment
General term for heavy equipment used in construction, such as excavators, bulldozers, and cranes.
建設現場には多くの建設機械が並んでいる。
A lot of construction machinery is lined up at the construction site.
この会社は建設機械のレンタルを行っている。
This company rents out construction equipment.
重機 is a more casual, abbreviated term for heavy machinery, often used on construction sites, while 建設機械 is the formal, full term.
Compound of 建設 (construction) and 機械 (machine).