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variable speed gear
avia.	变速机构
busin.	变速轮
cyc.sport	变速装置
earth.sc.	变速传动装置
mech.	变速转动齿轮
mech.eng.	变速〔传动〕装置
oil	变速传动装置
wind.	变速齿轮
variable-speed gear
agric.	无级变速装置
met.	变速装置
tech.	变速齿轮
transp.	积分装置; 积分轮

variable speed gear: 10 phrases in 5 subjects

Architecture	1
Earth sciences	1
Electronics	2
Metallurgy	2
Technology	4