chǐlúnchuándòng
ㄔˇ ㄌㄨㄣˊ ㄔㄨㄢˊ ㄉㄨㄥˋ
Simplified 齿轮传动
Taivo → Settings → Partner inbox → Make the link. It stays in this browser.
Keep 齒輪傳動 and it comes back until you know it.