treadles is treadle's Plural Form

treadle

US [ˈtred(ə)l]

UK ['tred(ə)l]

Plural Form：treadles

Synonym

n.	1. (纺车等的)踏板
v.	1. 踩踏板,踏动踏板;踩踏板开动(缝纫机等)

Definition:

AllAll,踩踏板踩踏板,踩踏板开动踩踏板开动,踏板踏板,轨道接触器轨道接触器

Category:AllAll,OralOral,WrittenWritten,TitleTitle,TechnicalTechnical

Source:AllAll,DictionaryDictionary,WebWeb

Difficulty:AllAll,EasyEasy,MiddleMiddle,HardHard

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The pistons go up and down as a person stands onliverlever devices- treadles- and uses a naturalworkingwalking motion .