螺纹的英文：
screw thread
thread
whorl
worm

参考例句：

Thread cutting
螺纹切削

triple thread
【机】三线螺纹

Screw on the box.
在箱子上刻螺纹。

Flight depth in metering zone no deeper than mm(for screws up to mm dia) j
测量区的螺纹深度不超过3.3mm(适合于螺杆直径100mm内)

A combination anode rod/hot water outlet nipple has been installed to extend tank life.
为了延长内胆使用寿命,本热水器安装了组合型阳极棒/热水出口螺纹接头。

Connect the cold water supply line and hot water outlet lines using elbows, nipples and unions as shown in the diagrams.
使用如图所示的弯管、螺纹接头、管道接头连接冷水进水管和热水出水管。

Gauges for sealing tube threads
用螺纹密封的管螺纹量规

Trapezoidal thread gauges
梯形螺纹量规

Gauges for tapered screw thread,metric series
米制锥螺纹量规

Screw thread
螺纹;螺丝牙

screw是什么意思：
n. 螺丝钉，螺旋状物；压力，扭曲；吝啬鬼；古怪的人
v. 拧，旋；逼迫；敲诈

Use the screw screw.
用刑具夹人。

The wheels screwed.
轮子旋转着。

Pointer screws.
指针旋转着。

thread是什么意思：
n. 线，棉线，毛线；丝状体；螺纹；头绪，思路
v. 穿线于…，装胶片于…；通，通过；穿成

pipe bend with female thread
两头带阴螺纹的弯头

To hang by a hair thread
千钧一发

There is a common thread in these two stories.
这两个故事之间有个共同的线索。

whorl是什么意思：
n. 轮生体,螺纹,螺旋一环,涡
vt. 使成涡漩

To coil or fold or cause to coil or fold in overlapping whorls.
卷绕(使)盘绕起来或(使)卷起成重叠的螺旋状物

This is quickly followed by the appearance of the second whorl of stamen primordia
接着很快出现了第二轮雄蕊原基。

A circular or whorled arrangement of flower parts such as those of petals or sepals.