tin knocker

Noun

A sheet metal worker, especially one who works with HVAC ductwork.

Japanese Meaning

薄板金属を用いて作業する職人、特に空調用ダクトの製作や修理を行う板金工

The tin knocker carefully measured the ducts before cutting the sheet metal for the new HVAC system.

その板金工は新しい空調システム用のダクトを切る前に、慎重に寸法を測った。

Sense（1）

A sheet metal worker, especially one who works with HVAC ductwork.

We can't hang drywall in here until the tin knockers are done.

tin knockers

（ plural ）