曲柄的英文：
brace
crank
winch

参考例句：

The pedal of a cycle is attached to a crank.
自行车的踏板与曲柄相连。

Years ago people had to crank the engine of a car to start it.
多年以前人们必须转动曲柄发动汽车引擎。

As the crankshaft rotates, the crankpin swings in a circle around the shaft
随着曲轴的转动，曲柄销绕主轴作圆周摆动。

A brace and bit
曲柄钻孔器

crook, shepherds'
牧羊人曲柄杖

"oil sear,crank shaft"
曲柄轴油封

Slider crank mechanism
滑块曲柄机构

The pedals of a cycle are attached to a crank.
用曲柄转动某物

The pedals of a cycle are attached to a crank
自行车的踏板与曲柄相连.

The propeller will windmill and crank the engine.
螺旋浆将旋转并转动引擎的曲柄。

brace是什么意思：
v. 振作起来；激励；支撑，支持
n. 支撑物；支柱；牙齿矫正器；大括弧

brace (a pair of braces)
背带,吊带

belt and braces
腰带和背带策略

brake shaft step brace
手制动轴承拉条

crank是什么意思：
n. 想法古怪的人；脾气乖戾的人；曲柄；奇想
v. 装曲柄；（用曲柄）转动（或启动）
adj. 古怪的；易怒的

A crank letter;a crank phone call.
一封怪信；一个古怪的电话

The pedal of a cycle is attached to a crank.
自行车的踏板与曲柄相连。

Bed, crank case
曲轴箱基座

winch是什么意思：
n. 绞盘,曲柄,绞车
vt. 用绞盘绞起

The winch was again put into operation and one of the men started up the truck
绞车再次运转起来，一名工人开动了急修车。

A steam brake,whistle,winch,etc,ie worked by steam
蒸汽制动器、汽笛、汽动绞车

The winch was again put into operation and one of the men started up the truck.
绞盘机再次启动，一位工人发动了急修车的引擎。