heavy machinery

heavy machinery (uncountable)

1. Used other than figuratively or idiomatically: see heavy,‎ machinery.
2. Industrial machinery that is large and heavy.

   You shouldn't operate heavy machinery without a licence.

   • 1991, China Machinery Industries Yearbook, page 35:

     The heavy machinery industry of China, including the manufacture of iron and steel plant, rolling mill, heavy—duty forging and pressing machinery, large forgings and castings, etc., developed along a hard and tortuous road from small products to huge ones, from single machines to complete plants after the birth of New China.

   • 1998, Paul Garvin, Iowa's minerals: their occurrence, origins, industries, and lore‎:

     Completion of the railroad allowed heavy machinery to be brought to the mine, including a 40-meter rotary kiln.

• “heavy-machinery”, in Cambridge English Dictionary, Cambridge, Cambridgeshire: Cambridge University Press, 1999–present.
• “heavy machinery”, in OneLook Dictionary Search.