Correct

蜗杆

/ wōgǎn / 
Strokes

Definition

worm (mechanical engineering)

Example

As a Noun

worm

1
Shuāngtóu
双头
wōgǎn
蜗杆

double-thread worm

2
Fēndù
分度
wōgǎn
蜗杆

indexing worm