Anh
free-pulley
dead pully
loose pulley
Đức
lose Rolle
Leerscheibe
Losrolle
Losscheibe
Pháp
poulie folle
poulie folle /ENG-MECHANICAL/
[DE] lose Rolle
[EN] free-pulley
[FR] poulie folle
[DE] Leerscheibe; Losrolle; Losscheibe
[EN] dead pully; loose pulley