三线的英文：
three-wire

参考例句：

triple thread
【机】三线螺纹

Twill weave cotton fabrics,>/=85%, not more than 200 g/m2, dyed
棉机织物,按重量计含棉量在85%及以上,染色,三线或四线斜纹机织物,包括双面斜纹机织物

Twill weave cotton fabric,>/=85%, not more than 200 g/m2, printed
棉机织物,按重量计含棉量在85%及以上,印花,三线或四线斜纹机织物,包括双面斜纹机织物

three是什么意思：
num. 三，三个

three coat,three bake
“三涂三烘” 工艺(反复涂三道漆，烘干三次的施工方法)

fiveteen contains five and three.
15可被5和3除尽。

To draw three feet of water
吃水三尺

It earned three Grammy Awards.
它赢得三项格莱美奖。

None of these three can be excluded.
这三者缺一不可。

wire是什么意思：
n. 金属丝；电线；电报
v. 给…装电线；拍电报

send (off) a wire
发电报

cable (=wire) a message
打电报发消息

The mattress is made of spring wires.
这个床垫是用弹簧做的。

Wire it will become durable .
里边加上电线会让它更耐用。

Please wire us the result.
请打电报告诉我们结果。