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空转轮
archit.	running idler
dril.	dead pulley; idler gear (wheel)
met.	free pulley; idle pulley; idler; idler pulley; loose pulley
oil	idle gear; idle wheel
tech.	free rolling wheel; gear idle; idling gear; intermediate wheel; pulley idler
telecom.	idle roller; pinch wheel
空转齿轮
tech.	idler; idler gear
空转带轮
auto.	idler pulley
空转〔载〕轮
mech.eng.	idle wheel
空转套皮带轮
mech.eng.	loose pulley
空转滑轮
tech.	idle pulley; idler pulley
空转〔载〕轮
tech.	idle gear
空转〔中界，过桥，支持〕轮
gen.	idler
空转导向，惰轮
auto.	deflection pulley
空转轮惰轮，中介齿轮
nautic., tech.	idler

空转 轮: 62 phrases in 9 subjects

Automobiles	5
Electronics	1
Hydroelectric power stations	1
Metallurgy	4
Oil / petroleum	5
Racing and motorsport	1
Rail transport	7
Shipbuilding	1
Technology	37